Investigate switching out zlib-ng for libdeflate

[EmilDohne]

From the benchmarks presented here https://github.com/zlib-ng/zlib-ng/issues/1486 it appears that even for larger buffers libdeflate outperforms zlib-ng on both compression ratios as well as speed.

It does provide a different api than zlib-ng and also doesnt support streaming which are both not necessarily concerns for our use cases.