Officially sunset async-std #1215

Job	Run time
Build with no-std	13s
Checking fmt and docs	28s
Check io_safety feature (ubuntu-latest)	19s
Build and test (ubuntu-latest, nightly)	1m 2s
Check tokio02 feature	19s
Check io_safety feature (windows-latest)	1m 42s
Build and test (ubuntu-latest, beta)	1m 3s
Check wasm targets (nightly)	2m 43s
Build and test (ubuntu-latest, stable)	1m 4s
Build and test (ubuntu-latest, 1.63)	1m 4s
Check wasm targets (beta)	2m 47s
Cross compile (i686-unknown-linux-gnu)	1m 48s
Build and test (windows-latest, nightly)	1s
Check wasm targets (stable)	2m 47s
Cross compile (powerpc-unknown-linux-gnu)	1m 58s
Build and test (windows-latest, beta)	36s
Cross compile (powerpc64-unknown-linux-gnu)	1m 57s
Build and test (windows-latest, stable)	37s
Cross compile (arm-linux-androideabi)	3m 26s
Build and test (windows-latest, 1.63)	36s
Build and test (macOS-latest, nightly)	1m 4s
Build and test (macOS-latest, beta)	1m 5s
Build and test (macOS-latest, stable)	1m 1s
Build and test (macOS-latest, 1.63)	1m 4s
	30m 44s

Provide feedback