Part of T211038: Create integration/edge-to-edge ensuring blocked users cannot edit Wikibase entities but for the special pages.
Special pages:
- Special:SetLabel
- Special:SetDescription
- Special:SetAliases
- Special:SetLabelDescriptionAliases
- Special:SetSiteLink
- Special:NewItem
- Special:MergeItems
- Special:RedirectEntity
- Special:NewLexeme
- Special:MergeLexemes
- fix some Wikibase special pages
- add tests for Wikibase special pages
- TBD: WikibaseLexeme