Remove packing for bools. #9755

Job	Run time
ormolu	11s
build ucm (ubuntu-20.04)	4m 27s
build ucm (macOS-13)	11m 54s
build ucm (windows-2019)	9m 28s
run transcripts (ubuntu-20.04)	3m 55s
generate jit source	10s
run transcripts (macos-13)	6m 49s
run transcripts (windows-2019)	7m 0s
run interpreter tests (ubuntu-20.04)	1m 3s
run interpreter tests (macos-13)	2m 12s
build jit binary / build jit binary (ubuntu-20.04)	8s
build jit binary / build jit binary (macOS-13)	16s
build jit binary / build jit binary (windows-2019)	19s
test jit / test jit (ubuntu-20.04)	7s
test jit / test jit (macOS-13)	16s
	48m 15s

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