Disconnect the CI OS detection from the OS version. (#776) #2385

Job	Run time
cargo clippy (wasm32)	1m 58s
cargo check (aarch64-android)	20s
cargo check (msrv) (wasm32)	22s
cargo check (msrv) (windows-latest)	2m 13s
cargo check (msrv) (macos-latest)	34s
cargo clippy (windows-latest)	5m 35s
cargo doc	45s
cargo check (msrv) (ubuntu-latest)	46s
cargo clippy (macos-latest)	2m 10s
formatting	27s
cargo clippy (ubuntu-latest)	3m 28s
Prime LFS Cache	7s
typos	3s
cargo test (wasm32)	25s
cargo test (windows-latest)	3m 58s
cargo test (macos-latest)	1m 27s
cargo test (ubuntu-latest)	4m 8s
	28m 46s

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