ZJIT: Fn stub: Move args to create appropriate unfilled optional para… #12789

Job	Run time
ruby-bench (--warmup=1 --bench=1 --excludes=shipit)	13m 12s
make (check, --disable-yjit)	7m 27s
make (check, cppflags=-DVM_CHECK_MODE)	8m 36s
make (check, --enable-shared --enable-load-relative)	7m 17s
make (check, ubuntu-24.04, capi)	10m 44s
make (test-bundled-gems)	19m 28s
make (test-bundler-parallel, 50)	22m 44s
make (check, i686)	11m 54s
make-ibm	0s
Ubuntu result	4s
	1h 41m 26s

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