Keep collection info on import from vanilla APIS

[skurzinz]

AFAICS the collection info is currently lost.

It is crucial for our setup.

[skurzinz]

seems to work for person entries, but not for places or institutions

[sennierer]

maybe data is not imported from vanilla

[sennierer]

https://github.com/acdh-oeaw/apis-instance-mpr-rdf/blob/main/apis_ontology/filtersets.py#L79-L83 needs to be added to institution, event, place, work