[IULRDC-198] bugfix: dashboard AdminSet select

[aploshay]

In draft status pending investigation of why this isn't happening on my localhost, and if its fixable via solr indexing

• Admin Set appears only once in the Collection Type filtering dropdown on the Collections pages on the Dashboard. Previously it appeared twice, as “Admin Set” and as “Hyrax::AdministrativeSet”
  UPDATE: got it to happen on localhost; see follow-up comments

[aploshay]

@rdlebeau This appears to be a hyrax bug -- @dlpierce should we create an issue for it, in the hyrax repo? Is it still present in the current version?

My::CollectionsController configures facets with a skip method:
https://github.com/samvera/hyrax/blob/v5.0.1/app/controllers/hyrax/my/collections_controller.rb#L9-L23
that currently excludes Hyrax::ModelRegistry.collection_rdf_representations values from menu selection:
["Collection", "Hyrax::PcdmCollection"]
but it's missing a corresponding exclusion of Hyrax::ModelRegistry.admin_set_rdf_representations:
["AdminSet", "Hyrax::AdministrativeSet"]
which is why "Hyrax::AdministrativeSet" is showing up alongside "Admin Set" in the Collection Type select menu at /dashboard/collections?locale=en

Suggested fix is up on my fork:
main...aploshay:rdc:iulrdc-184_dashboard_adminset_select
Note that because the controller immediately calls .configure_facets on line 23, this has to be done as a full override instead of a patch, to work.