[python] Pin pandas to be less than 3.0.0

[jp-dark]

Add a temporary pin until we can fix test failures using pandas==3.0.0 (see SOMA-826).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.02%. Comparing base (a464795) to head (2f69eeb).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4382      +/-   ##
==========================================
+ Coverage   86.16%   89.02%   +2.86%     
==========================================
  Files         139       62      -77     
  Lines       21118     7162   -13956     
  Branches       15        0      -15     
==========================================
- Hits        18196     6376   -11820     
+ Misses       2922      786    -2136     

Flag	Coverage Δ
python	89.02% <ø> (-0.03%)	⬇️
r	?

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

Components	Coverage Δ
python_api	89.02% <ø> (-0.03%)	⬇️
libtiledbsoma	∅ <ø> (∅)

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