Make facets "origin" and "type" searchable

This MR will make the facets "origin" and "type" searchable, mainly as a fallback for users who did not see the suggestions for filtering with these facets while typing a search query. While the option to filter with facets does a better job at this, search queries like "pressemitteilung feldhamster" or "luftqualität brandenburg" should still show adequately ranked results that do not contain "pressemitteilung" or "brandenburg" in their title or description