(feat): pre-processing functions for dask with sparse chunks

[flying-sheep]

• Towards Expand dask support #2578 and maybe others? Highly variable genes for sparse dataset in backed mode #2764
• Tests included or not required because:

• Release notes not necessary because:

Note I did not follow:
https://gist.github.com/Intron7/bbf5058794be7b81d3953ae39c17d8b8

This is because this PR is basically very simple. I just added an axis_sum function for dispatching on dask arrays (with sparse chunks) which now handles the needed functionality and then it propagates up to various functions as noted in the release note: scanpy.pp.scale, scanpy.pp.filter_cells, scanpy.pp.filter_genes, scanpy.pp.scale and scanpy.pp.highly_variable_genes

[codecov]

Codecov Report

Attention: Patch coverage is 96.71053% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 75.47%. Comparing base (921fcca) to head (937c6db).

❗ Current head 937c6db differs from pull request most recent head b3581ea. Consider uploading reports for the commit b3581ea to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2856      +/-   ##
==========================================
+ Coverage   75.25%   75.47%   +0.22%     
==========================================
  Files         116      116              
  Lines       12788    12896     +108     
==========================================
+ Hits         9623     9733     +110     
+ Misses       3165     3163       -2     

Files	Coverage Δ
scanpy/preprocessing/_distributed.py	95.23% <100.00%> (-4.77%)	⬇️
scanpy/preprocessing/_highly_variable_genes.py	95.60% <100.00%> (ø)
scanpy/preprocessing/_utils.py	54.66% <100.00%> (+5.41%)	⬆️
scanpy/testing/_pytest/params.py	100.00% <100.00%> (ø)
scanpy/_utils/__init__.py	74.40% <98.87%> (+5.70%)	⬆️
scanpy/preprocessing/_simple.py	85.15% <96.15%> (+1.94%)	⬆️
scanpy/preprocessing/_normalization.py	85.71% <85.00%> (-3.32%)	⬇️

[ilan-gold]

pre-commit.ci autofix