Add sample probabilities

[flying-sheep]

• Closes Add mask to sc.pp.sample #3368
• Tests included or not required because:

• Release notes not necessary because:

[codecov]

Codecov Report

Attention: Patch coverage is 84.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 76.65%. Comparing base (ac4c629) to head (179c9f2).

Files with missing lines	Patch %	Lines
src/scanpy/get/get.py	75.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3410      +/-   ##
==========================================
- Coverage   76.66%   76.65%   -0.01%     
==========================================
  Files         112      112              
  Lines       12935    12946      +11     
==========================================
+ Hits         9916     9924       +8     
- Misses       3019     3022       +3     

Files with missing lines	Coverage Δ
src/scanpy/get/_aggregated.py	95.20% <100.00%> (-0.04%)	⬇️
src/scanpy/plotting/_tools/scatterplots.py	86.72% <100.00%> (-0.04%)	⬇️
src/scanpy/preprocessing/_scale.py	78.94% <100.00%> (ø)
src/scanpy/preprocessing/_simple.py	91.42% <100.00%> (+0.06%)	⬆️
src/scanpy/tools/_rank_genes_groups.py	94.50% <100.00%> (-0.02%)	⬇️
src/scanpy/get/get.py	91.17% <75.00%> (-1.06%)	⬇️