Setup ruby_memcheck #518

Job	Run time
Ruby memcheck	44s
ruby-versions / Generate Ruby versions	4s
ubuntu-22.04 2.7	1m 18s
ubuntu-22.04 3.0	28s
ubuntu-22.04 3.1	34s
ubuntu-22.04 3.2	29s
ubuntu-22.04 3.3	29s
ubuntu-22.04 head	1m 31s
ubuntu-22.04 jruby	29s
ubuntu-22.04 jruby-head	33s
macos-13 2.7	1m 21s
macos-13 3.0	42s
macos-13 3.1	27s
macos-13 3.2	31s
macos-13 3.3	29s
macos-13 head	19s
macos-13 jruby	40s
macos-13 jruby-head	55s
macos-14 2.7	36s
macos-14 3.0	18s
macos-14 3.1	31s
macos-14 3.2	19s
macos-14 3.3	19s
macos-14 head	13s
macos-14 jruby	21s
macos-14 jruby-head	23s
windows-latest 2.7	2m 18s
windows-latest 3.0	1m 29s
windows-latest 3.1	1m 44s
windows-latest 3.2	1m 36s
windows-latest 3.3	1m 52s
windows-latest head	45s
windows-latest mswin	50s
ubuntu-latest jruby-9.4	31s
macos-latest truffleruby-head	44s
ubuntu-latest truffleruby-head	2m 0s
	28m 52s

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