ModGC

ZJIT: LIR CCall survivors: Use one stack layout across arches #2777

Job	Run time
check (mmtk, release, macos-latest)	13m 36s
check (default, macos-latest)	6m 55s
check (mmtk, release, ubuntu-latest)	8m 58s
check (default, ubuntu-latest)	7m 50s
	37m 19s

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