Added experimental User-Agent Client Hints #2085

Job	Run time
build_nightly	1m 35s
Check	1m 10s
build_benchmarks	53s
build_examples	3m 51s
Verify that web-sys is compiled correctly	50s
Clippy	6m 36s
dist_linux_aarch64_gnu	2m 36s
dist_linux_x86_64_musl	2m 23s
dist_macos_aarch64	1m 18s
dist_macos_x86_64	1m 5s
dist_windows	3m 35s
doc_api	1m 5s
doc_book	5s
Rustfmt	9s
Build and test the deno example	46s
Run js-sys crate tests	1m 57s
Run native tests	1m 45s
Run wasm-bindgen crate tests with multithreading enabled	1m 23s
Test TypeScript output of wasm-bindgen	1m 24s
Run UI compile-fail tests	43s
Run wasm-bindgen crate tests (unix)	10m 8s
Run wasm-bindgen-webidl crate tests	2m 1s
Run web-sys crate tests	7m 11s
test_examples	1m 45s
deploy	25s
	56m 39s

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