Test

feat: Add experimental closures support with feature flag #4950

Job	Run time
Check	6s
Loader	18s
Runtimes	33s
Bootstrap (release)	19s
Features	24s
Compiler (ubuntu, node current)	1m 35s
Compiler (macos, node lts/*)	1m 20s
Coverage	3m 12s
Compiler (windows, node lts/*)	1m 25s
Compiler (ubuntu, node lts/*)	1m 34s
Compiler (macos, node current)	1m 33s
Compiler (windows, node current)	1m 24s
Bootstrap (debug)	19s
	14m 2s

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