Backport PR #3351: Simplify scale

[ilan-gold]

• Closes #
• Tests included or not required because:

• Release notes not necessary because:

[codecov]

Codecov Report

Attention: Patch coverage is 89.39394% with 7 lines in your changes missing coverage. Please review.

Project coverage is 75.60%. Comparing base (53bccaf) to head (21d6a21).
Report is 1 commits behind head on 1.11.x.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/scanpy/preprocessing/_scale.py	88.00%	6 Missing ⚠️
src/scanpy/tools/_louvain.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           1.11.x    #3635   +/-   ##
=======================================
  Coverage   75.59%   75.60%           
=======================================
  Files         114      114           
  Lines       13157    13137   -20     
=======================================
- Hits         9946     9932   -14     
+ Misses       3211     3205    -6     

Files with missing lines	Coverage Δ
src/scanpy/_utils/__init__.py	77.11% <100.00%> (+0.19%)	⬆️
src/scanpy/preprocessing/_deprecated/__init__.py	90.47% <100.00%> (+9.70%)	⬆️
src/scanpy/preprocessing/_normalization.py	82.02% <100.00%> (ø)
src/scanpy/tools/_louvain.py	62.50% <50.00%> (+1.27%)	⬆️
src/scanpy/preprocessing/_scale.py	75.83% <88.00%> (-2.27%)	⬇️