Add OptionalQuery extractor #3989

Job	Run time
cargo-hack	6m 41s
check	3m 5s
check-docs	1m 11s
cargo-public-api-crates (axum)	1m 9s
cargo-deny check (advisories)	23s
cargo-public-api-crates (axum-core)	50s
dependencies-are-sorted	1m 13s
cargo-deny check (bans licenses sources)	28s
Spell Check with Typos	7s
cargo-public-api-crates (axum-extra)	1m 24s
cargo-public-api-crates (axum-macros)	48s
test-docs	0s
test-versions	0s
test-nightly	0s
wasm32-unknown-unknown	0s
armv5te-unknown-linux-musleabi	0s
test-msrv	0s
	17m 19s

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