support chdir

[CvvT]

LiteBox's fs does not support changing current working directory. Add support for chdir in litebox_shim_linux and ensure always passing absolute path to LiteBox.

[github-actions]

🤖 SemverChecks 🤖 ⚠️ Potential breaking API changes detected ⚠️

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--- failure enum_no_repr_variant_discriminant_changed: enum variant had its discriminant change value ---

Description:
The enum's variant had its discriminant value change. This breaks downstream code that used its value via a numeric cast like `as isize`.
        ref: https://doc.rust-lang.org/reference/items/enumerations.html#assigning-discriminant-values
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/enum_no_repr_variant_discriminant_changed.ron

Failed in:
  variant SyscallRequest::Mmap 10 -> 11 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1878
  variant SyscallRequest::Mprotect 11 -> 12 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1886
  variant SyscallRequest::Munmap 12 -> 13 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1891
  variant SyscallRequest::Mremap 13 -> 14 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1895
  variant SyscallRequest::Brk 14 -> 15 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1902
  variant SyscallRequest::RtSigprocmask 15 -> 16 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1905
  variant SyscallRequest::RtSigaction 16 -> 17 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1911
  variant SyscallRequest::RtSigreturn 17 -> 18 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1917
  variant SyscallRequest::Kill 18 -> 19 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1920
  variant SyscallRequest::Tkill 19 -> 20 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1924
  variant SyscallRequest::Tgkill 20 -> 21 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1928
  variant SyscallRequest::Sigaltstack 21 -> 22 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1933
  variant SyscallRequest::Ioctl 22 -> 23 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1937
  variant SyscallRequest::Pread64 23 -> 24 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1941
  variant SyscallRequest::Pwrite64 24 -> 25 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1947
  variant SyscallRequest::Readv 25 -> 26 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1953
  variant SyscallRequest::Writev 26 -> 27 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1958
  variant SyscallRequest::Access 27 -> 28 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1963
  variant SyscallRequest::Madvise 28 -> 29 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1967
  variant SyscallRequest::Dup 29 -> 30 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1972
  variant SyscallRequest::Socket 30 -> 31 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1977
  variant SyscallRequest::Socketpair 31 -> 32 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1987
  variant SyscallRequest::Connect 32 -> 33 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1993
  variant SyscallRequest::Accept 33 -> 34 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:1998
  variant SyscallRequest::Sendto 34 -> 35 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2004
  variant SyscallRequest::Sendmsg 35 -> 36 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2012
  variant SyscallRequest::Recvfrom 36 -> 37 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2017
  variant SyscallRequest::Bind 37 -> 38 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2025
  variant SyscallRequest::Listen 38 -> 39 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2030
  variant SyscallRequest::Setsockopt 39 -> 40 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2034
  variant SyscallRequest::Getsockopt 40 -> 41 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2041
  variant SyscallRequest::Getsockname 41 -> 42 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2048
  variant SyscallRequest::Getpeername 42 -> 43 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2053
  variant SyscallRequest::Uname 43 -> 44 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2058
  variant SyscallRequest::Fcntl 44 -> 45 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2061
  variant SyscallRequest::Getcwd 45 -> 46 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2065
  variant SyscallRequest::EpollCtl 46 -> 47 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2069
  variant SyscallRequest::EpollPwait 47 -> 48 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2075
  variant SyscallRequest::EpollCreate 48 -> 49 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2083
  variant SyscallRequest::Ppoll 49 -> 50 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2087
  variant SyscallRequest::Pselect 50 -> 51 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2094
  variant SyscallRequest::ArchPrctl 51 -> 52 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2102
  variant SyscallRequest::Readlink 52 -> 53 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2105
  variant SyscallRequest::Readlinkat 53 -> 54 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2110
  variant SyscallRequest::Openat 54 -> 55 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2116
  variant SyscallRequest::Ftruncate 55 -> 56 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2122
  variant SyscallRequest::Unlinkat 56 -> 57 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2126
  variant SyscallRequest::Newfstatat 57 -> 58 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2132
  variant SyscallRequest::Eventfd2 58 -> 59 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2145
  variant SyscallRequest::Pipe2 59 -> 60 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2149
  variant SyscallRequest::Clone 60 -> 61 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2153
  variant SyscallRequest::Clone3 61 -> 62 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2156
  variant SyscallRequest::SetThreadArea 62 -> 63 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2161
  variant SyscallRequest::ClockGettime 63 -> 64 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2164
  variant SyscallRequest::ClockGetres 64 -> 65 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2168
  variant SyscallRequest::ClockNanosleep 65 -> 66 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2172
  variant SyscallRequest::Gettimeofday 66 -> 67 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2178
  variant SyscallRequest::Time 67 -> 68 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2182
  variant SyscallRequest::Getrlimit 68 -> 69 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2185
  variant SyscallRequest::Setrlimit 69 -> 70 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2189
  variant SyscallRequest::Prlimit 70 -> 71 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2193
  variant SyscallRequest::SetTidAddress 71 -> 72 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2204
  variant SyscallRequest::Gettid 72 -> 73 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2207
  variant SyscallRequest::SetRobustList 73 -> 74 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2208
  variant SyscallRequest::GetRobustList 74 -> 75 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2211
  variant SyscallRequest::GetRandom 75 -> 76 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2216
  variant SyscallRequest::Getpid 76 -> 77 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2221
  variant SyscallRequest::Getppid 77 -> 78 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2222
  variant SyscallRequest::Getuid 78 -> 79 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2223
  variant SyscallRequest::Geteuid 79 -> 80 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2224
  variant SyscallRequest::Getgid 80 -> 81 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2225
  variant SyscallRequest::Getegid 81 -> 82 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2226
  variant SyscallRequest::Sysinfo 82 -> 83 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2227
  variant SyscallRequest::CapGet 83 -> 84 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2230
  variant SyscallRequest::GetDirent64 84 -> 85 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2234
  variant SyscallRequest::SchedGetAffinity 85 -> 86 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2239
  variant SyscallRequest::SchedYield 86 -> 87 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2244
  variant SyscallRequest::Futex 87 -> 88 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2245
  variant SyscallRequest::Execve 88 -> 89 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2248
  variant SyscallRequest::Umask 89 -> 90 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2253
  variant SyscallRequest::Prctl 90 -> 91 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2256
  variant SyscallRequest::Alarm 91 -> 92 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2259
  variant SyscallRequest::SetITimer 92 -> 93 in /home/runner/work/litebox/litebox/litebox_common_linux/src/lib.rs:2262

[wdcui]

LGTM. Just a style comment below.

[wdcui]

Nit: should we be consistent with the code above: either define get_cwd closure or not?