run deflate tests under stacked borrows

[folkertdev]

we now pass the zlib-rs and test-libz-rs-sys tests under miri with (the default) stacked borrows 🎉

cc @inahga

[codecov]

Codecov Report

Attention: Patch coverage is 93.29268% with 11 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
zlib-rs/src/deflate/hash_calc.rs	66.66%	6 Missing ⚠️
zlib-rs/src/deflate.rs	94.73%	2 Missing ⚠️
zlib-rs/src/allocate.rs	97.36%	1 Missing ⚠️
zlib-rs/src/deflate/window.rs	91.66%	1 Missing ⚠️
zlib-rs/src/weak_slice.rs	94.73%	1 Missing ⚠️

Files with missing lines	Coverage Δ
test-libz-rs-sys/src/deflate.rs	98.16% <100.00%> (+<0.01%)	⬆️
test-libz-rs-sys/src/end_to_end.rs	75.71% <ø> (ø)
zlib-rs/src/deflate/longest_match.rs	88.97% <100.00%> (ø)
zlib-rs/src/deflate/pending.rs	96.96% <100.00%> (+0.24%)	⬆️
zlib-rs/src/deflate/slide_hash.rs	99.09% <100.00%> (ø)
zlib-rs/src/inflate/window.rs	97.57% <100.00%> (ø)
zlib-rs/src/read_buf.rs	91.30% <100.00%> (+0.82%)	⬆️
zlib-rs/src/allocate.rs	98.43% <97.36%> (-0.56%)	⬇️
zlib-rs/src/deflate/window.rs	90.19% <91.66%> (+0.61%)	⬆️
zlib-rs/src/weak_slice.rs	96.22% <94.73%> (-0.84%)	⬇️
... and 2 more

... and 3 files with indirect coverage changes

[inahga]

Excellent! Thanks for working through this.