[lib] Refactor report store reducer
Summary:
issue: https://linear.app/comm/issue/ENG-5813/refactor-report-store-ops
We send reports to the report store, not the keyservers. So I will remove them on identity login / logout, not on keyserver login / logout / setNewSession.
Identity will be handled in ENG-6424
Test Plan: Tested that reports are stll removed on logout
Reviewers: michal, kamil, ginsu
Reviewed By: michal, ginsu
Subscribers: ashoat, tomek
Differential Revision: https://phab.comm.dev/D10619