Remove packing for bools. #9757

Job	Run time
ormolu	13s
build ucm (ubuntu-20.04)	3m 54s
build ucm (macOS-13)	13m 24s
build ucm (windows-2019)	9m 2s
generate jit source	9s
run interpreter tests (ubuntu-20.04)	6s
run transcripts (ubuntu-20.04)	4m 2s
run interpreter tests (macos-13)	12s
run transcripts (macos-13)	6m 47s
run transcripts (windows-2019)	7m 23s
build jit binary / build jit binary (ubuntu-20.04)	8s
build jit binary / build jit binary (macOS-13)	15s
build jit binary / build jit binary (windows-2019)	17s
test jit / test jit (ubuntu-20.04)	6s
test jit / test jit (macOS-13)	14s
	46m 12s

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