[Finishes #71516516] Fetching list search works with pagination

 - A long standing work-around was triggering keyup on the search field after
   pagination re-rendered the content details. The keyup event would trigger a
   new fetch for the first page thus jumping back to the first page.
 - SchemaDatasetIndex page was unaffected becuase the event was only triggered
   when the filter attr was 'namePattern'. WorkspaceDatasetIndex was search/pagination
   interaction has likely been broken for some time.
 - Now, we mixin search on the collection and use the collection's searchAttr both when
   fetching for the index pages and replacing the previous workaround