add `&CORE::chdir` (properly) #13574

Job	Run time
involved_authors_debug	6s
Sanity: Linux -Dusethreads	10m 36s
Test dist/ modules on MacOS system perl	4m 30s
ASAN (-Accflags=-DPURIFY)	22m 8s
dist-modules (latest)	2m 16s
ASAN (-DDEBUGGING)	22m 56s
cygwin	34m 19s
dist-modules (5.24)	2m 16s
ASAN (-Dusethreads)	22m 54s
install	10m 41s
dist-modules (5.10)	2m 12s
dist-modules (5.8)	2m 16s
linux (-Uusethreads)	9m 41s
linux i386/ubuntu (-Dusedevel)	15m 39s
Windows mingw64	34m 24s
linux (-Duseshrplib -Dusequadmath -Dusecbacktrace -Dusethreads)	11m 25s
linux (-Duserelocatableinc)	9m 28s
minitest	3m 38s
PERL_UNICODE (-Uusethreads)	8m 41s
linux (-Dcc='clang')	9m 56s
macOS (Monterey) 12 (-Uusethreads)	11m 57s
PERL_UNICODE (-Dusethreads -Accflags=-DPURIFY -Dcc='gcc -fsanitize=address' -Dld='gcc -fsanitize=...	23m 44s
linux (-Dcc='g++')	10m 1s
macOS (Monterey) 12 (-Duseithreads -Duseshrplib)	13m 3s
Windows msvc142	51m 57s
linux (-Accflags=-DSILENT_NO_TAINT_SUPPORT)	9m 15s
linux (-Accflags=-DNO_TAINT_SUPPORT)	9m 16s
linux (-DDEBUGGING -Accflags=-DPERL_RC_STACK)	9m 59s
linux (-Uusedl)	9m 13s
	6h 28m 27s

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