Backport PR #2942 on branch 1.10.x (updates sparse scale)

[meeseeksmachine]

Backport PR #2942: updates sparse scale

[codecov]

Codecov Report

Attention: Patch coverage is 81.96721% with 22 lines in your changes are missing coverage. Please review.

Project coverage is 73.17%. Comparing base (99cc32f) to head (4042018).

Additional details and impacted files

@@            Coverage Diff             @@
##           1.10.x    #2985      +/-   ##
==========================================
- Coverage   75.49%   73.17%   -2.32%     
==========================================
  Files         116      117       +1     
  Lines       12911    12919       +8     
==========================================
- Hits         9747     9454     -293     
- Misses       3164     3465     +301     

Files	Coverage Δ
scanpy/preprocessing/__init__.py	100.00% <100.00%> (ø)
scanpy/preprocessing/_simple.py	81.21% <100.00%> (-3.95%)	⬇️
scanpy/tools/_rank_genes_groups.py	94.33% <100.00%> (ø)
scanpy/preprocessing/_scale.py	81.51% <81.51%> (ø)

... and 26 files with indirect coverage changes