Add experimental `ViewTransition` interface (#3598) #1379

Job	Run time
Clippy	6m 56s
Rustfmt	11s
Check	1m 41s
Verify that web-sys is compiled correctly	1m 46s
Run js-sys crate tests	4m 5s
Run native tests	2m 45s
Run wasm-bindgen crate tests with multithreading enabled	2m 46s
Run wasm-bindgen crate tests (unix)	11m 45s
Run web-sys crate tests	9m 14s
build_benchmarks	1m 26s
build_examples	6m 24s
build_nightly	2m 49s
dist_linux_aarch64_gnu	4m 22s
dist_linux_x86_64_musl	4m 38s
dist_macos_aarch64	8m 7s
dist_windows	7m 5s
dist_macos_x86_64	4m 21s
Build and test the deno example	1m 39s
Test TypeScript output of wasm-bindgen	2m 16s
Run wasm-bindgen-webidl crate tests	4m 1s
Run UI compile-fail tests	4m 22s
doc_api	1m 28s
doc_book	14s
test_examples	4m 16s
deploy	1m 42s
	1h 40m 19s

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