Unversion dimension values locally

[bprusinowski]

Currently, we unversion the dimension values by sending a query with all values using http://schema.org/sameAs predicate to LINDAS. While this is a performant query, it still takes some time to fetch the unversioned values. Based on this conversation we might drop the queries and unversion the values locally, by stripping the version number and improve performance of the application a little bit.

Potential implementation: https://github.com/visualize-admin/visualization-tool/blob/1b864ad8d9ed9c158915393f4ee027e246395501/app/rdf/queries.ts#L679-L720