[web] Use redux cookie for communication
Summary:
ENG-4748
Depends on D9287
Actually start using the redux cookie on web.
Test Plan:
Log in to incognito window:
- check that there is only anonymous browser cookie (sent when loading a web page, but not replaced when logged in)
- send a message
- check that there are no errors in console, no errors on the keyserver
- check that there is no disconnected banner (no more than usual)
Reviewers: inka, kamil, atul
Reviewed By: kamil
Subscribers: ashoat, tomek
Differential Revision: https://phab.comm.dev/D9288