Test

feat: Add experimental closures support with feature flag #4949

Job	Run time
Check	5s
Runtimes	31s
Coverage	3m 37s
Features	20s
Bootstrap (debug)	23s
Bootstrap (release)	20s
Loader	22s
Compiler (ubuntu, node lts/*)	38s
Compiler (macos, node lts/*)	24s
Compiler (windows, node current)	33s
Compiler (macos, node current)	29s
Compiler (ubuntu, node current)	36s
Compiler (windows, node lts/*)	28s
	8m 46s

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