[native] Wait with registration and restoration for the logout to conclude

Summary:
Show the loading state before the logout is concluded.

https://linear.app/comm/issue/ENG-10224/block-the-restoration-until-the-logout-is-concluded

Test Plan: Log out and check if the loading state is displayed. Also check that without the internet connection.

Reviewers: kamil, bartek

Reviewed By: bartek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D14393