Foreign garbage collection #9130

Job	Run time
unit_test (ubuntu-latest)	11m 34s
unit_test (ubuntu-latest, --no-default-features)	11m 11s
unit_test (ubuntu-latest, --features libc,std)	11m 24s
build	45s
unit_test (ubuntu-latest, --features gc_always --exclude stak-compiler)	16m 50s
integration_test (ubuntu-latest, stak-tools, chibi-scheme)	13m 31s
build (--no-default-features)	1m 9s
minimal	3m 45s
integration_test (ubuntu-latest, stak-tools, gosh)	7m 12s
build (--all-features)	1m 5s
integration_test (ubuntu-latest, stak-tools, guile)	37m 36s
profile	3m 7s
integration_test (ubuntu-latest, stak-tools, gosh, gc_always, not @long)	20m 41s
integration_test (ubuntu-latest, chibi, (not @stak or @chibi) and not @library)	6m 13s
self_host_integration_test (ubuntu-latest, stak, not @library)	6m 18s
self_host_integration_test (ubuntu-latest, stak-tools)	49m 19s
self_host_test	17m 14s
integration_test (ubuntu-latest, gauche, not @stak or @gauche)	5m 42s
wasm	2m 41s
self_host_integration_test (ubuntu-latest, mstak, not @environment-variable and not @float and no...	5m 26s
integration_test (ubuntu-latest, guile, (not @stak or @guile) and not @library)	5m 49s
self_host_integration_test (ubuntu-latest, mstak-tools, not @environment-variable and not @float)	45m 19s
test	1s
	4h 43m 52s

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