Backport patches to 0.36 #3439

Job	Run time
Check --no-default-features (nightly)	22s
Check (stable)	3m 42s
Check (nightly)	5m 3s
Check (1.48)	9m 56s
Rustfmt	14s
Check nightly-only targets (nightly)	25s
Check selected Tier 3 platforms (nightly)	2m 52s
Test (ubuntu)	55s
Test rustix_use_experimental_asm (powerpc64le-linux)	2m 42s
Test use-libc (ubuntu)	48s
Test (ubuntu-20.04)	43s
Test (i686-linux)	1m 4s
Test use-libc (i686-linux)	1m 16s
Test use-libc (aarch64-linux)	3m 17s
Test (aarch64-linux)	1m 0s
Test use-libc (powerpc64le-linux)	3m 40s
Test (powerpc64le-linux)	1m 2s
Test use-libc (riscv64-linux)	2m 48s
Test (riscv64-linux)	1m 4s
Test use-libc (arm-linux)	2m 50s
Test (s390x-linux)	1m 2s
Test (arm-linux)	1m 2s
Test (ubuntu-stable)	46s
Test (ubuntu-1.48)	1m 4s
Test (i686-linux-stable)	47s
Test (aarch64-linux-stable)	1m 4s
Test (riscv64-linux-stable)	1m 4s
Test (s390x-linux-stable)	1m 3s
Test (powerpc64le-linux-stable)	1m 3s
Test (arm-linux-stable)	1m 6s
Test (ubuntu-1.48)	1m 1s
Test (i686-linux-1.48)	1m 3s
Test (aarch64-linux-1.48)	1m 4s
Test (riscv64-linux-1.48)	1m 4s
Test (s390x-linux-1.48)	1m 3s
Test (powerpc64le-linux-1.48)	1m 1s
Test (arm-linux-1.48)	1m 5s
Test (macos-latest)	40s
Test (macos-11)	59s
Test (windows)	50s
Test (windows-2019)	50s
	1h 6m 24s

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