What is the change?

Provide ParameterCollection.where() for better iteration of parameters

Allows selective iteration of parameters that meet, by their definition
not their value, a certain condition. This would be useful to
iterate over all parameters on a Block that are relevant for
neutronics calculations with:

for p in block.p.where(lambda pd: pd.hasCategory("neutronics")):
    ...

The argument is a function that should return true for a given parameter
and can be complicated:

block.p.where(
    lambda pd: (
        pd.atLocation(ParamLocation.EDGES) or
        pd.atLocation(ParamLocation.CORNERS)
    )
)

Why is the change being made?

Inspired by HexBlock rotation where we need to do stuff for parameters that meet certain criteria.

Closes #1898

Checklist

• This PR has only one purpose or idea.
• Tests have been added/updated to verify any new/changed code.

• The code style follows good practices.
• The commit message(s) follow good practices.

• The release notes have been updated if necessary.
• The documentation is still up-to-date in the doc folder.
• The dependencies are still up-to-date in pyproject.toml.