Use pyuvdata Analytic Beams and the new BeamInterface class

[bhazelton]

Description

Use the newly refactored Analytic Beams in pyuvdata and the new BeamInterface object that unifies the interface for interpolation of UVBeams & evaluation of Analytic Beams.

Note: This is a significant change for "unpolarized" Analytic beams, including uniform, gaussian and Airy beams. The previous implementation in pyuvsim actually implemented these as polarized beams, with one polarization sensitive only to the zenith angle oriented emission and the other sensitive only to azimuthally oriented emission. The new implementation in pyuvdata makes these actually unpolarized so that the two instrumental polarizations are equally sensitive to both zenith angle and azimuthally oriented polarization and are identical to each other. This last point leads to the biggest change -- the instrumental cross pol ("xy" and "yx") visibilities for these unpolarized beams are equal to the same pol ("xx" and "yy") visibilities, whereas with the previous implementations they were zero for unpolarized sources. In particular, this will lead to differences in reference simulations that use these kinds of beams.

Related changes:

• Remove all analytic beam specifications in pyuvsim.
• BeamLists now contain BeamInterface objects (but are still initialized with lists of UVBeam and/or Analytic Beam objects)
• Significant refactoring of BeamLists, removing the string/object mode and replacing it with a shared memory approach similar to what is done for SkyModel objects.
• require at least pyuvdata v3.0 (this will actually need to be increased to the version that contains the analytic beams -- for now the CI is grabbing the related pyuvdata branch).
• Remove handling for older pyuvdata versions.

Motivation and Context

closes #443

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] 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:

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

New feature checklist:

• [x] I have added or updated the docstrings associated with my feature using the numpy docstring format.
• [x] I have updated the documentation to highlight my new feature (if appropriate).
• [x] I have added tests to cover my new feature.
• [x] 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.

[bhazelton]

Two parallelized tests are currently timing out. I'm worried that's related to how I'm handling the shared memory stuff, would love someone who's more familiar with MPI to take a look. Maybe @mkolopanis ?

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 79.60199% with 41 lines in your changes missing coverage. Please review.

Project coverage is 75.04%. Comparing base (685ee72) to head (d5d88c2).

Files	Patch %	Lines
src/pyuvsim/telescope.py	76.59%	22 Missing :warning:
src/pyuvsim/uvsim.py	38.09%	13 Missing :warning:
src/pyuvsim/antenna.py	76.92%	3 Missing :warning:
src/pyuvsim/simsetup.py	95.89%	3 Missing :warning:

:exclamation: There is a different number of reports uploaded between BASE (685ee72) and HEAD (d5d88c2). Click for more details.

HEAD has 9 uploads less than BASE

| Flag | BASE (685ee72) | HEAD (d5d88c2) | |------|------|------| ||11|2|

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #487 +/- ## ============================================ - Coverage 100.00% 75.04% -24.96% ============================================ Files 11 10 -1 Lines 2159 2024 -135 ============================================ - Hits 2159 1519 -640 - Misses 0 505 +505 ```

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