[lib] Add hook to log out on invalid CSAT

Summary:
Address ENG-9528.
Added a hook that performs authoritative keyserver and visual logout. It should be called when Identity is already logged out.

Test Plan: Tested together with the next diff where it is used

Reviewers: kamil, varun, ashoat

Reviewed By: ashoat

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D13955