Add CartesianProductSet to PyROS

[shermanjasonaf]

Summary/Motivation:

This PR adds to PyROS the CartesianProductSet class, a new pre-implemented concrete UncertaintySet subclass for representing a Cartesian product (or cross product) of uncertainty sets. For simplicity, this initial implementation of the CartesianProductSet does not support products involving one or more discrete uncertainty sets; such support will be added in a future PR.

Changes proposed in this PR:

• Add PyROS CartesianProductSet class

Legal Acknowledgement

By contributing to this software project, I have read the contribution guide and agree to the following terms and conditions for my contribution:

1. I agree my contributions are submitted under the BSD license.
2. I represent I am authorized to make the contributions and grant the license. If my employer has rights to intellectual property that includes these contributions, I represent that I have received permission to make contributions and grant the required license on behalf of that employer.

[shermanjasonaf]

@jas-yao @natalieisenberg @jsiirola

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.08%. Comparing base (ae432ba) to head (1fdac67).
⚠️ Report is 58 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3927      +/-   ##
==========================================
+ Coverage   90.07%   90.08%   +0.01%     
==========================================
  Files         904      904              
  Lines      107003   107081      +78     
==========================================
+ Hits        96384    96469      +85     
+ Misses      10619    10612       -7     

Flag	Coverage Δ
builders	29.16% <27.84%> (+<0.01%)	⬆️
default	86.41% <100.00%> (?)
expensive	35.58% <27.84%> (?)
linux	87.56% <100.00%> (-2.01%)	⬇️
linux_other	87.56% <100.00%> (+0.01%)	⬆️
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[jsiirola]

This looks good. Some minor updates to docstrings if you have time, but (in my opinion) nothing that must prevent merging.

[mrmundt]

@shermanjasonaf - The Jenkins tests are not related to you. Theoretically they should be fixed on the next re-run.

[shermanjasonaf]

@jas-yao @jsiirola, which of the following do you prefer?

1. Merge this PR ahead of PyROS Add caching for computed uncertain parameter bounds #3877. In this case, I think that after this PR is merged, we should ensure that PyROS Add caching for computed uncertain parameter bounds #3877 is, for consistency, amended to support caching of bounds for the CartesianProductSet
2. Merge PyROS Add caching for computed uncertain parameter bounds #3877 ahead of this PR. In this case, after PyROS Add caching for computed uncertain parameter bounds #3877 is merged, I will amend this PR to support caching of bounds for the CartesianProductSet

We should also ensure that the PyROS version number and changelog are updated after each PR according to the merging order that we decide upon.

[mrmundt]

@shermanjasonaf - I'm happy to merge this. Please let me know what you'd like.

[jsiirola]

I would vote for going ahead and merging this. I have a quick question/comment for @jas-yao over on #3877.