Update zjit_diff to report on stat keys from all rubies #1699

Job	Run time
test (head)	53s
benchmark-run-once	1m 35s
benchmark-default (ruby)	13m 39s
benchmark-default (head)	13m 30s
benchmark-ractor-only (head)	37s
benchmark-graph	48s
benchmark-ractor (head)	6m 41s
test (truffleruby)	1m 54s
benchmark-default (truffleruby, --excludes=knucleotide,lobsters,ruby-lsp,shipit)	14m 7s
test (ruby)	55s
all-tests	3s
	54m 42s

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