Revert "[fix] Temporarily deactivate WikibaseKnownTypesTests for ws/wpbeta"
Revert "[fix] Temporarily deactivate WikibaseKnownTypesTests for ws/wpbeta"

This reverts commit a9fd96b00220b5dc777e2d8ec9251b52dd3442dc.
The underlying problem is solved in  I7c17eaa670b

Add unsupported 'entity-schema' data type

Bug: T210322
Change-Id: I1265dcf336510423dbd0bd69b822bfb26bde9a7d

PersianWikipedia/pywikibot-core,wikimedia/pywikibot-core,wikimedia/pywikibot-core