Add fairness to futures_util::{select, try_select, select_ok} #2229

Job	Run time
cargo +1.36 build (futures-{core, io, sink})	1m 32s
cargo test (ubuntu-latest)	4m 24s
cargo test (macos-latest)	7m 48s
cargo test (windows-latest)	8m 12s
cargo test (ubuntu-latest, aarch64-unknown-linux-gnu)	5m 43s
cargo test (ubuntu-latest, armv7-unknown-linux-gnueabihf)	10m 41s
cargo test (ubuntu-latest, armv5te-unknown-linux-gnueabi)	9m 26s
cargo test (ubuntu-latest, i686-unknown-linux-gnu)	4m 59s
cargo bench	1m 33s
cargo +stable build	1m 6s
cargo +beta build	1m 5s
cargo +nightly build	1m 4s
codegen	30s
cargo hack check --feature-powerset	3m 30s
cargo minimal-versions build	50s
cargo miri test	10m 46s
cargo build --target thumbv7m-none-eabi	39s
cargo build --target thumbv6m-none-eabi	37s
cargo +1.56 build	1m 40s
cargo clippy	45s
cargo doc	35s
cargo fmt	8s
cargo test -Z sanitizer=address	5m 5s
cargo test -Z sanitizer=memory	3m 54s
cargo test -Z sanitizer=thread	2m 49s
	1h 29m 21s

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