Merge pull request #489 from ruby/mvh-add-gc-stats #1789

Job	Run time
benchmark-ractor (head)	6m 48s
benchmark-default (truffleruby, --excludes=knucleotide,lobsters,ruby-lsp,shipit)	13m 30s
benchmark-default (ruby)	11m 59s
benchmark-ractor-only (head)	41s
test (truffleruby)	2m 6s
test (ruby)	1m 6s
test (head)	46s
benchmark-run-once	1m 34s
benchmark-graph	1m 5s
benchmark-default (head)	12m 25s
all-tests	4s
	52m 4s

Provide feedback