[lib] Extract invalidateKeyserverSession in useKeyserverRecoveryLogIn
Summary: In the next diff, I'll add some code that will call logOut in this newly extracted callback. Instead of repeating it, I decided to extract it to a single place first.
Test Plan:
This diff is a simple refactor. In addition to the following test plan I used for the next diff, I also made sure that Flow/ESLint were satisfied with the refactor.
- I hacked legacy-recover-keyserver-session.js to use the wrong password so the session recovery would fail
- I started the iOS simulator and logged in using a test user
- I opened the Redux Dev Tools
- I deleted the test user's cookie from the MariaDB database: DELETE FROM cookies WHERE user = 6390578 AND platform = 'ios'
- I sent a message as the test user
- I confirmed that session recovery was triggered in the Redux dev tools
- I confirmed that after session recovery failed, the user was logged out in the UI
- Via Redux dev tools, I confirmed that after session recovery failed, LOG_OUT_STARTED and LOG_OUT_SUCCESS were dispatched
Reviewers: inka, tomek
Reviewed By: inka
Differential Revision: https://phab.comm.dev/D11264