Unaligned bit arrays on the JavaScript target #8097

Job	Run time
test-wasm	1m 16s
test (stable, x86_64-unknown-linux-gnu)	3m 30s
test (stable, x86_64-unknown-linux-musl)	6m 6s
validate	9s
test (stable, aarch64-unknown-linux-gnu)	1m 57s
rustfmt	13s
test (stable, aarch64-unknown-linux-musl)	2m 50s
test (stable, x86_64-apple-darwin)	11m 55s
lint-build	1m 25s
test (stable, x86_64-pc-windows-msvc)	6m 9s
test (stable, aarch64-apple-darwin, macos-latest, false, true)	3m 43s
test-projects	2m 19s
	41m 32s

Provide feedback