Implement miogration to recreate olm accounts
Summary:
This differential recreates olm accounts to fix the case if keyserver had olm accounts created with old olm library version, but
there are newer clients trying to log - in.
Test Plan:
- Run migrations.
- check out to the last commit before reverts of e2e notifs stack.
- Build mobile app and try to log in. It should be succesfull
Reviewers: ashoat
Reviewed By: ashoat
Subscribers: tomek, atul
Differential Revision: https://phab.comm.dev/D8037