Polarization task doesn't write ionic polarization to database

[sthartman]

https://github.com/hackingmaterials/atomate/blob/01558e8c3e38470c02bc8b50c0ee3aa6198e5206/atomate/vasp/firetasks/parse_outputs.py#L1128

Hi, The polarization analysis task writes raw_electron_polarization to the database, but not raw_ion_polarization. Looking at the code in parse_outputs.py, I don't think this is the intended behavior, although I'm not certain. In any case, it would be helpful to have both of the components of polarization written to the database.