merge API tweaks #8962

Job	Run time
build ucm (ubuntu-20.04)	3m 49s
ormolu	12s
build ucm (macOS-12)	9m 16s
build ucm (windows-2019)	31m 27s
generate jit source	9s
run interpreter tests (ubuntu-20.04)	1m 6s
run transcripts (ubuntu-20.04)	3m 52s
run interpreter tests (macOS-12)	2m 34s
run transcripts (macOS-12)	5m 58s
run transcripts (windows-2019)	6m 57s
build jit binary / build jit binary (ubuntu-20.04)	13s
build jit binary / build jit binary (macOS-12)	22s
build jit binary / build jit binary (windows-2019)	31s
test jit / test jit (ubuntu-20.04)	8s
test jit / test jit (macOS-12)	13s
	1h 6m 47s

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