issue: ENG-6097
We don't want to persist temporarily connected keyservers

If VERSION or VERIFY_INVITE_LINK endpoints were called, we should somehow mark the keyserver as “temporarily” connected - keyserverConnectionHandler will not be attempting to log the user in to that keyserver, and this keyserver will not be persisted.

1. It might be useful to use the same cookie that we got from the keyserver, in the next request
2. But calling those endpoints doesn’t necessarily mean that the user wants to permanently connect (login) to this keyserver. The user might for example resign from accepting an invite link.

Added a keyserver with connectionIssue: 'temporarily_connected', closed the app, opened the app, checked that the keyserver is gone