[python] setuptools>=70.1 in sdist GHA

[ryan-williams]

Issue and/or context: nightly failures #3102, #3105; follow-on to #3076

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.35%. Comparing base (40e2178) to head (6a3d4c5).
Report is 1 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (40e2178) and HEAD (6a3d4c5). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (40e2178)	HEAD (6a3d4c5)
python	1	0

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #3106       +/-   ##
===========================================
- Coverage   88.95%   51.35%   -37.61%     
===========================================
  Files          45       66       +21     
  Lines        4293     9370     +5077     
  Branches        0      851      +851     
===========================================
+ Hits         3819     4812      +993     
- Misses        474     4349     +3875     
- Partials        0      209      +209     

Flag	Coverage Δ
libtiledbsoma	51.35% <ø> (?)
python	?

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

Components	Coverage Δ
python_api	∅ <ø> (∅)
libtiledbsoma	49.92% <ø> (∅)

[ryan-williams]

Manually ran python-packaging.yml on this commit here, it passed.