[web] Replace ashoatKeyserverID with authoritativeKeyserverID

Summary: issue: ENG-6635

Test Plan: Tested that it is possible to send messages, recieve them, create entries, log out, log in, sent media and no errors show up

Reviewers: michal, tomek

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D11008