As a first step in informing users about constraint violations, let's install WikibaseQualityConstraints (the extension that implements the wbcheckconstraint api call) on beta commons to test if commons can make use of wikidata constraints
This ticket is only to deploy the extension to beta.
The idea is to unblock an 'investigation' spike - when (and only when) it's deployed we can see if using beta-wikidata constraints on beta-commons works out of the box. That investigation spike can come after this ticket is complete