Create terms for certain columns if they are missing upon CSV import

For the columns radGeneralMaterialDesignation and descriptionStatus, create terms on CSV import if they aren't already in the taxonomy in AtoM
Looks good in general!

For the term creation you could use the helper in QubitFlatfileImport:

  $culture = isset($self->object->culture) ? $self->object->culture : 'en';
  QubitFlatfileImport::createTerm($QubitTaxonomy::DESCRIPTION_STATUS_ID, $descStatus, $culture);

(There's another term creation later in the code this could work for too. )