Normalize hex addresses in zjit_diff stat keys #1736

Job	Run time
benchmark-ractor-only (head)	40s
benchmark-ractor (head)	6m 44s
test (truffleruby)	1m 48s
benchmark-run-once	1m 38s
benchmark-default (head)	13m 21s
test (head)	43s
benchmark-default (ruby)	13m 41s
benchmark-graph	45s
test (ruby)	53s
benchmark-default (truffleruby, --excludes=knucleotide,lobsters,ruby-lsp,shipit)	13m 10s
all-tests	3s
	53m 26s

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