Bump MSRV of utility crates to 1.63 (#2907) #2991

Job	Run time
cargo clippy	14s
cargo bench	48s
cargo +1.36 build (futures-{core, io, sink})	40s
cargo +stable build	38s
cargo +beta build	37s
cargo doc	17s
cargo hack check --feature-powerset	2m 19s
cargo fmt	11s
cargo +nightly build	36s
cargo minimal-versions build	24s
cargo miri test	14m 25s
cargo build --target thumbv7m-none-eabi	26s
cargo test -Z sanitizer=address	3m 35s
cargo build --target thumbv6m-none-eabi	27s
cargo test -Z sanitizer=memory	5m 42s
cargo test (ubuntu-latest)	2m 42s
cargo test -Z sanitizer=thread	2m 29s
cargo +1.63 build	1m 9s
cargo test (macos-latest)	5m 42s
cargo test (windows-latest)	4m 32s
cargo test (ubuntu-latest, aarch64-unknown-linux-gnu)	3m 34s
cargo test (ubuntu-latest, armv7-unknown-linux-gnueabihf)	6m 3s
cargo test (ubuntu-latest, armv5te-unknown-linux-gnueabi)	6m 24s
cargo test (ubuntu-latest, i686-unknown-linux-gnu)	4m 27s
	1h 8m 21s

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