port avx512 implementation of compare256

[folkertdev]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Flag	Coverage Δ
fuzz-compress	36.36% <ø> (ø)
fuzz-decompress	27.35% <ø> (?)
test-aarch64-apple-darwin	91.47% <ø> (ø)
test-aarch64-unknown-linux-gnu	88.75% <ø> (-0.02%)	⬇️
test-i686-unknown-linux-gnu	88.50% <ø> (-0.02%)	⬇️
test-x86_64-apple-darwin	90.20% <ø> (ø)
test-x86_64-unknown-linux-gnu	91.01% <ø> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
zlib-rs/src/deflate/compare256.rs	96.63% <ø> (ø)

... and 4 files with indirect coverage changes

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