[python] Add to_spatial_data method to ExperimentAxisQuery

[jp-dark]

Add the method to_spatial_data to ExperimentAxisQuery that exports the results from the axis query to a SpatialData object.

[sc-59943]

[codecov]

Codecov Report

Attention: Patch coverage is 76.19048% with 5 lines in your changes missing coverage. Please review.

Project coverage is 86.27%. Comparing base (382d691) to head (af9eb27).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3431      +/-   ##
==========================================
+ Coverage   86.03%   86.27%   +0.24%     
==========================================
  Files          55       55              
  Lines        6278     6295      +17     
==========================================
+ Hits         5401     5431      +30     
+ Misses        877      864      -13     

Flag	Coverage Δ
python	86.27% <76.19%> (+0.24%)	⬆️

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Components	Coverage Δ
python_api	86.27% <76.19%> (+0.24%)	⬆️
libtiledbsoma	∅ <ø> (∅)