Add PartialEq and PartialOrd instances for byte arrays `[u8; N]` #1952

Job	Run time
rustfmt	8s
test (pinned, ubuntu-latest, 1.65.0)	31s
test (stable, ubuntu-latest, stable)	32s
test (beta, ubuntu-latest, beta)	30s
test (nightly, ubuntu-latest, nightly)	14s
test (macos, macos-latest, stable)	28s
test (win-msvc, windows-latest, stable)	17s
test (win-gnu, windows-latest, stable-x86_64-gnu)	25s
	3m 5s

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