Add `Alphabetic` distribution #1274

Job	Run time
Check Clippy and rustfmt	12s
test-cross (ubuntu-latest, powerpc-unknown-linux-gnu, stable)	54s
Check doc	28s
test (ubuntu-latest, x86_64-unknown-linux-gnu, stable)	38s
test (macos-latest, x86_64-apple-darwin, stable)	43s
test-ios	27s
test-miri	5m 17s
test (windows-latest, x86_64-pc-windows-gnu, stable)	2m 23s
test-no-std	12s
test (windows-latest, x86_64-pc-windows-msvc, beta)	1m 20s
test (ubuntu-latest, x86_64-unknown-linux-gnu, MSRV, 1.63.0)	2m 52s
test (ubuntu-latest, sudo apt-get update ; sudo apt install gcc-multilib, i686-unknown-linux-gnu,...	51s
test (ubuntu-latest, x86_64-unknown-linux-gnu, nightly, minimal_versions)	45s
	17m 2s

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