Implement FromRequest for BytesMut #4382

Job	Run time
check-docs	50s
check	2m 17s
cargo-public-api-crates (axum)	1m 0s
cargo-hack	6m 4s
cargo-public-api-crates (axum-core)	48s
cargo-deny check (advisories)	14s
cargo-public-api-crates (axum-extra)	59s
cargo-deny check (bans licenses sources)	14s
dependencies-are-sorted	45s
cargo-public-api-crates (axum-macros)	50s
Spell Check with Typos	0s
test-msrv	3m 54s
test-nightly	2m 34s
armv5te-unknown-linux-musleabi	1m 18s
test-docs	2m 16s
test-versions (stable)	4m 8s
wasm32-unknown-unknown	31s
test-versions (beta)	4m 6s
	32m 48s

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