Check that beam basis vectors are aligned with the azimuth and zenith angle

[bhazelton]

Description

This adds a check that the beam basis vectors are aligned with the azimuth and zenith angle in each pixel. This is currently assumed but not checked in pyuvsim.

Motivation and Context

In the future we'd like to properly support other basis vectors (#395), but this ensures that we at least test for this and error if it's not the case.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Reference simulation update or replacement
• Documentation change (documentation changes only)
• Version change
• Build or continuous integration change

Checklist:

For all pull requests:

• I have read the contribution guide.
• My code follows the code style of this project.

Bug fix checklist:

• My fix includes a new test that breaks as a result of the bug (if possible).
• All new and existing tests pass.
• I have checked that I reproduce the reference simulations or if there are differences they are explained below (if appropriate). If there are changes that are correct, I will update the reference simulation files after this PR is merged.
• I have checked (e.g., using the benchmarking tools) that this change does not significantly increase typical runtimes. If it does, I have included a justification in the comments on this PR.
• I have updated the CHANGELOG.

[codecov]

Codecov Report

Merging #405 (9d059dc) into main (c79535b) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #405   +/-   ##
=======================================
  Coverage   99.34%   99.35%           
=======================================
  Files          13       13           
  Lines        2141     2157   +16     
=======================================
+ Hits         2127     2143   +16     
  Misses         14       14           

Impacted Files	Coverage Δ
pyuvsim/telescope.py	100.00% <100.00%> (ø)

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[steven-murray]

All looks good except one typo, thanks @bhazelton !