[keyserver] delete marking prekeys as published each time olm account is accessed
Summary:
Issue: ENG-3944.
This is part of D8476 (breaking this for smaller diffs because it's complex).
Keys should be marked as published only on:
Depends on D9421
Test Plan: N/A (but tested in previous diff that after actual publishing, keys are marked as published).
Reviewers: varun, marcin, ashoat
Reviewed By: marcin, ashoat
Subscribers: tomek, wyilio
Differential Revision: https://phab.comm.dev/D9422