Fix PyROS IntersectionSet Implementation

[shermanjasonaf]

Summary/Motivation:

This PR resolves issues introduced in #3341, to ensure that PyROS truly supports IntersectionSet instances representing intersections of uncertainty set sequences containing either of the following:

• A set defined using "auxiliary" uncertain parameters (e.g., CardinalitySet, FactorModelSet)
• A discrete set (e.g., DiscreteScenarioSet)

These use cases are now covered in the PyROS automated tests.

Changes proposed in this PR:

• Fix IntersectionSet implementation for cases where discrete sets and/or sets involving auxiliary parameters are to be intersected
• Add tests ensuring that the PyROS solver works for the above use cases
• Tweak/fix and more extensively test several standard UncertaintySet base class attributes

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.42%. Comparing base (13facca) to head (a292315).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3786      +/-   ##
==========================================
+ Coverage   89.40%   89.42%   +0.01%     
==========================================
  Files         909      909              
  Lines      105541   105579      +38     
==========================================
+ Hits        94364    94416      +52     
+ Misses      11177    11163      -14     

Flag	Coverage Δ
builders	29.11% <41.17%> (+<0.01%)	⬆️
default	86.04% <100.00%> (?)
expensive	35.76% <41.17%> (?)
linux	86.74% <100.00%> (-2.44%)	⬇️
linux_other	86.74% <100.00%> (+0.01%)	⬆️
osx	82.89% <100.00%> (+0.02%)	⬆️
win	84.99% <100.00%> (+0.01%)	⬆️
win_other	84.99% <100.00%> (+0.01%)	⬆️

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[shermanjasonaf]

@jas-yao @natalieisenberg

[jsiirola]

Looks great. One minor documentation request, but nothing I would hold up the PR for.

[jsiirola]

Ideally, this would be a formal type:

Suggested change

	list of tuple
	list[tuple[float, float]]

(this comment applies below, too)