Add fairness to futures_util::{select, try_select, select_ok} #2226

Job	Run time
cargo +stable build	1m 12s
cargo +beta build	1m 24s
cargo +nightly build	1m 8s
cargo test (ubuntu-latest)	4m 45s
cargo test (macos-latest)	8m 20s
cargo test (windows-latest)	8m 16s
cargo test (ubuntu-latest, aarch64-unknown-linux-gnu)	4m 24s
cargo test (ubuntu-latest, armv7-unknown-linux-gnueabihf)	7m 51s
cargo test (ubuntu-latest, armv5te-unknown-linux-gnueabi)	11m 4s
cargo test (ubuntu-latest, i686-unknown-linux-gnu)	4m 39s
cargo bench	1m 33s
codegen	32s
cargo hack check --feature-powerset	4m 7s
cargo build --target thumbv7m-none-eabi	37s
cargo build --target thumbv6m-none-eabi	37s
cargo +1.56 build	2m 16s
cargo +1.36 build (futures-{core, io, sink})	2m 49s
cargo clippy	33s
cargo doc	32s
cargo fmt	8s
cargo miri test	12m 31s
cargo test -Z sanitizer=address	4m 11s
cargo test -Z sanitizer=memory	3m 22s
cargo test -Z sanitizer=thread	2m 57s
cargo minimal-versions build	43s
	1h 30m 31s

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