Allows selective iteration of parameters that meet, by their definition
not their value, meet a certain condition. This would be useful to
iterate over all parameters on a ``Block`` that are relevant for
neutronics calculations with
```python
for p in block.p.where(lambda pd: "neutronics" in pd.categories):
    ...
```
The argument is a function that should return true for a given parameter
and can be complicated
```python
block.p.where(
    lambda pd: (
        pd.atLocation(ParamLocation.EDGES) or
        pd.atLocation(ParamLocation.CORNERS)
    )
)
```

Closes #1898

(cherry picked from commit 4162cd7)

Co-authored-by: John Stilley <[email protected]>

* main:
  Fixing a problem with the latest release of h5py (#1907)

Co-authored-by: John Stilley <[email protected]>