Buffer writing gzipfile

Once python/cpython#101251 is merged the code can be ported to these bindings to upgdrade the performance.

Since the issue is effectively solved in python 3.12, it does not really need to be solved in ISA-L making previous versions of python faster is a concern. Porting the fix would make maintaining it more difficult. So I figure simply waiting until everybody is on 3.12 is easier.