Enable runtime tests on Windows #8015

Job	Run time
ormolu	24s
build ucm (ubuntu-20.04)	12s
build ucm (macOS-12)	21s
build ucm (windows-2019)	30s
generate jit source	6s
run interpreter tests (ubuntu-20.04)	6s
run transcripts (ubuntu-20.04)	6s
run interpreter tests (macOS-12)	14s
run transcripts (macOS-12)	1m 42s
run transcripts (windows-2019)	16s
run interpreter tests (windows-2019)	2m 7s
build jit binary / build jit binary (ubuntu-20.04)	21s
build jit binary / build jit binary (macOS-12)	18s
build jit binary / build jit binary (windows-2019)	22s
test jit / test jit (ubuntu-20.04)	1m 23s
test jit / test jit (macOS-12)	2m 16s
test jit / test jit (windows-2019)	2m 21s
	13m 5s

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