Use the new pyuvdata analytic short dipole beam in our polarized source test.

[bhazelton]

Description

Replaces the ad hoc analytic short dipole used in our testing of polarized sources with the pyuvdata analytic short dipole beam.

This requires bumping the minimum pyuvdata version to v3.1.0.

I also bumped the minimum lunarsky version to 0.2.5 for compatibility with astropy 6.0

Motivation and Context

Checklists:

Other Change Checklist

• I have read the contribution guide.
• My code follows the code style of this project.
• Any new or updated docstrings use the numpy docstring format.
• I have updated the tutorial to highlight my new feature (if appropriate).
• I have added tests to cover any changes.
• My change includes a breaking change
  • My change includes backwards compatibility and deprecation warnings (if possible).
• I have updated the CHANGELOG if appropriate.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (eb75e59) to head (2f9fecc).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #268   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files            5         5           
  Lines         2121      2120    -1     
  Branches       543       543           
=========================================
- Hits          2121      2120    -1     

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