feat(maitake-sync): `mutex-traits` integration #1373

Job	Run time
changed_paths	5s
rustfmt	14s
cargo check (host)	32s
clippy	54s
Loom tests (cordyceps)	1m 30s
docs	34s
cargo test (host)	51s
cargo test (cross x64)	1m 41s
Loom tests (maitake)	47s
Miri tests (codyceps)	2m 4s
Tests (maitake, no-default-features)	1m 38s
Loom tests (mycelium-util)	40s
build boot image (x86_64)	1m 12s
	12m 42s

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