[python] Complete #3140

[johnkerl]

Issue and/or context: As tracked on issue #2407 / [sc-51048].

Note that the intended Python and R API changes are all agreed on and finalized as described in #2407.

Changes:

On #3140 I missed a spot. I found this while working on experiment-level resize on #3148.

Notes for Reviewer:

[codecov]

Codecov Report

Attention: Patch coverage is 77.77778% with 2 lines in your changes missing coverage. Please review.

Project coverage is 83.04%. Comparing base (50d63c1) to head (71929ba).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3151      +/-   ##
==========================================
+ Coverage   82.92%   83.04%   +0.11%     
==========================================
  Files          50       50              
  Lines        5229     5236       +7     
==========================================
+ Hits         4336     4348      +12     
+ Misses        893      888       -5     

Flag	Coverage Δ
python	83.04% <77.77%> (+0.11%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
python_api	83.04% <77.77%> (+0.11%)	⬆️
libtiledbsoma	∅ <ø> (∅)