Avoid clone in layer #4908

Job	Run time
cargo-hack	5m 5s
check-docs	23s
check	1m 36s
cargo-public-api-crates (axum)	29s
cargo-public-api-crates (axum-core)	17s
cargo-deny check (advisories)	22s
dependencies-are-sorted	17s
cargo-public-api-crates (axum-extra)	27s
cargo-deny check (bans licenses sources)	26s
Spell Check with Typos	4s
cargo-public-api-crates (axum-macros)	22s
armv5te-unknown-linux-musleabi	43s
test-msrv	1m 52s
test-nightly	1m 32s
test-docs	1m 28s
test-versions (stable)	2m 38s
wasm32-unknown-unknown	21s
test-versions (beta)	2m 53s
	21m 15s

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