Implement --randomize-powerset feature #3303

Job	Run time
test (no rustup)	2m 2s
test (1.26)	7m 3s
test (stable)	3m 37s
test (1.30)	4m 50s
test (beta)	3m 33s
test (1.31)	5m 20s
test (nightly)	3m 17s
test (1.36)	6m 11s
test (nightly, macos-latest)	3m 7s
test (1.39)	5m 50s
test (nightly, windows-latest)	4m 54s
test (1.41)	5m 34s
deny / deny	13s
miri / miri	1m 2s
msrv / prepare	3s
release-dry-run / prepare	6s
tidy / tidy	1m 7s
msrv / build (ubuntu-latest)	5m 20s
msrv / build (windows-latest)	6m 57s
release-dry-run / build (aarch64-unknown-linux-gnu)	1m 0s
release-dry-run / build (aarch64-unknown-linux-musl)	48s
release-dry-run / build (aarch64-apple-darwin, macos-13)	1m 37s
release-dry-run / build (aarch64-pc-windows-msvc, windows-2019)	2m 25s
release-dry-run / build (x86_64-unknown-linux-gnu)	36s
release-dry-run / build (x86_64-unknown-linux-musl)	48s
release-dry-run / build (x86_64-apple-darwin, macos-13)	1m 18s
release-dry-run / build (x86_64-pc-windows-msvc, windows-2019)	2m 28s
release-dry-run / build (x86_64-unknown-freebsd)	1m 24s
release-dry-run / build (x86_64-unknown-illumos)	58s
release-dry-run / build (universal-apple-darwin, macos-13)	1m 24s
	1h 24m 52s

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