Numpy 2 Updates

[asher-m]

This PR includes many small changes to the tests to ensure numpy >= 2 compatibility. In particular, this PR addresses:

• warnings/errors resulting from casting arrays ndim > 0 to scalar
• some small name changes in numpy 2
  • e.g., np.Inf (which was always an alias for np.inf) was removed

Some items remaining to be considered:

• Update requirements.txt and config.py to some version of numpy >= 2
• Consider removing UncertainSCI.utils.version
  • The version module appears to only be used to verify numpy version >= 1.17, but I haven't thoroughly investigated this yet.
  • Regardless of where this module is used, I'm of the belief that this type of version checking/validation should be left to the package manager (pip or conda).
  • This also lets us (minorly) simplify the code interface because we don't have the implement two versions of our code for the quirks of our dependencies, though in practice I've only seen this used in our code for choosing a particular implementation of np.choice.

[asher-m]

This PR resolves issue #123.