Add --zjit-mem flag to show ZJIT memory stats in summary table #1805

Job	Run time
benchmark-default (truffleruby, --excludes=knucleotide,lobsters,ruby-lsp,shipit)	13m 19s
benchmark-run-once	1m 36s
benchmark-graph	53s
benchmark-default (head)	12m 55s
benchmark-ractor-only (head)	35s
test (head)	52s
test (ruby)	50s
benchmark-default (ruby)	12m 24s
benchmark-ractor (head)	6m 46s
test (truffleruby)	1m 52s
all-tests	4s
	52m 6s

Provide feedback