Test

Do not reset EnvUtil.timeout_scale #455

Job	Run time
check (MarkSweep, release, ubuntu-latest)	15m 23s
check (MarkSweep, release, macos-latest)	28m 37s
check (MarkSweep, debug, 150, ubuntu-latest)	1h 58m 30s
check (Immix, release, macos-latest)	28m 14s
check (Immix, release, ubuntu-latest)	12m 18s
check (Immix, debug, 150, macos-latest)	1h 11m 47s
check (MarkSweep, debug, 150, macos-latest)	1h 28m 56s
check (Immix, debug, 150, ubuntu-latest)	1h 27m 49s
	7h 31m 34s

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