Add pages_swept_by_ruby_thread counter #12902

Job	Run time
ruby-bench (--warmup=1 --bench=1 --excludes=shipit)	14m 29s
make (check, ubuntu-24.04, capi)	5m 22s
make (test-bundled-gems)	12m 58s
make (check, --enable-shared --enable-load-relative)	4m 41s
make (test-bundler-parallel, 50)	20m 28s
make (check, i686)	3m 0s
make (check, --disable-yjit)	4m 30s
make (check, cppflags=-DVM_CHECK_MODE)	4m 59s
make-ibm	0s
Ubuntu result	2s
	1h 10m 29s

Provide feedback