Update devdeps tests to use more recent python, numpy

[rosteen]

This forces the devdeps environment to install dev numpy 2, despite matplotlib dev wanting <2. Also upgrades python in the devdeps environment to 3.12. Closes #1082 and closes #1083. Thanks to @pllim.

I'm sure there will be some test failures here, I'll also clean those up in this PR.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.73%. Comparing base (1967512) to head (ab09241).
Report is 51 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1086   +/-   ##
=======================================
  Coverage   70.73%   70.73%           
=======================================
  Files          64       64           
  Lines        4483     4483           
=======================================
  Hits         3171     3171           
  Misses       1312     1312           

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[rosteen]

Somewhat surprisingly, nothing failed in the new test env.

I also decided to update the Windows/MacOS tests to use python 3.11, and made all the older tests uniformly test on Ubuntu. Seems more logical to me this way.

[pllim]

I am glad to see it is green, though coverage is only 70% package-wide, so YMMV.

[pllim]

Full Python Version: 
3.12.0rc3 (main, Sep 19 2023, 15:43:21) [GCC 11.4.0]

Package versions: 
Numpy: 2.0.0.dev0+git20230926.5c46c11
Scipy: 1.12.0.dev0+1777.bf77616
Matplotlib: 3.9.0.dev301+gd60de5ed4d
astropy: 6.0.dev728+g0c73d13f6
gwcs: 0.19.0
asdf: 3.0.0.dev613+g9680015
asdf-astropy: 0.4.1.dev62+gb4e1764
stdatamodels: 1.8.2
ndcube: 2.1.3
spectral-cube: 0.6.2

I guess if you are feeling adventurous, you can test more dev packages but out of scope here.

[pllim]

LGTM. Thanks!