Add return options to `initialize_uvdata_from_params` and `initialize_catalog_from_params`

[bhazelton]

Description

• Add a return_beams parameter to the initialize_uvdata_from_params function to have it return the beam list and dict. Defaults to True currently, but will default to False starting in version 1.4.
• Add a return_catname parameter to the initialize_catalog_from_params function to have it return the catalog name. Defaults to True currently, but will default to False starting in version 1.4.
• Also broke out some code into a helper function because of complexity issues.

Motivation and Context

closes #215

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.
• [ ] 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.
• [x] I have updated the CHANGELOG.

[codecov[bot]]

Codecov Report

Merging #390 (43d51b3) into main (2d01e1d) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #390   +/-   ##
=======================================
  Coverage   99.33%   99.34%           
=======================================
  Files          13       13           
  Lines        2094     2124   +30     
=======================================
+ Hits         2080     2110   +30     
  Misses         14       14           

Impacted Files	Coverage Δ
pyuvsim/simsetup.py	99.89% <100.00%> (+<0.01%)	:arrow_up:
pyuvsim/uvsim.py	99.42% <100.00%> (ø)

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[bhazelton]

@steven-murray This PR addresses an issue you made some time ago. Can you take a look?

[bhazelton]

@steven-murray I just updated the changelog and docs, can you re-review?