[python] Connect resizers to the Python API

[johnkerl]

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

Changes:

Connects the resizers to the Python API, for #2964

Notes for Reviewer:

R support on a separate PR. Less urgent since R doesn't have append mode yet (#1630).

[codecov]

Codecov Report

Attention: Patch coverage is 68.42105% with 12 lines in your changes missing coverage. Please review.

Project coverage is 83.03%. Comparing base (6b65790) to head (d121dc4).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3140      +/-   ##
==========================================
- Coverage   83.05%   83.03%   -0.02%     
==========================================
  Files          50       50              
  Lines        5198     5229      +31     
==========================================
+ Hits         4317     4342      +25     
- Misses        881      887       +6     

Flag	Coverage Δ
python	83.03% <68.42%> (-0.02%)	⬇️

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

Components	Coverage Δ
python_api	83.03% <68.42%> (-0.02%)	⬇️
libtiledbsoma	∅ <ø> (∅)

[nguyenv]

Thanks!