- Native Valkyrie objects contain a URI string, not an RDF::URI
- Fedora contains Hyrax::ControlledVocabularies::Location objects

Modifies the behavior of the `based_near` attribute in the `to_resource`
and `from_resource` methods. When using wings to convert between
resources & fedora works, we were previously storing the RDF::URI in
Valkyrie. This PR updates the behavior to consistently return values
consistent with what would be seen in native objects.

This may still be needed, but this doesn't work correctly.
A ticket has been created for this bug if this is something that is
ever needed.

#6926

…grate_based_near