Sync with v0.8 branch #3128

Job	Run time
dependencies	15s
test (1.63, ubuntu-latest)	11m 36s
test (1.63, windows-latest)	15m 26s
test (stable, ubuntu-latest)	10m 5s
test (stable, windows-latest)	14m 7s
features (msrv)	53s
test (nightly, ubuntu-latest)	9m 37s
codegen	11s
features (nightly)	25s
clippy	13s
test (nightly, windows-latest)	13m 17s
test (nightly, ubuntu-latest, i686-unknown-linux-gnu)	10m 49s
miri (channel)	23m 37s
test (nightly, ubuntu-latest, armv7-unknown-linux-gnueabihf)	15m 42s
careful	5m 11s
miri (others)	10m 50s
test (nightly, ubuntu-latest, armv5te-unknown-linux-gnueabi)	16m 57s
test (stable, ubuntu-latest, sparc64-unknown-linux-gnu)	14m 55s
docs	11s
loom	51s
rustfmt	6s
san	13m 53s
shellcheck	7s
	3h 9m 14s

Provide feedback