If a user receives more than one invite to join a
realm, after that user registers, all the remaining
invitations should be revoked, preventing them to be
listed in active invitations on admin panel.
To do this, we added a new prereg_user status,
STATUS_REVOKED.
We also added a confirmation_link_expired_error page
in case the user tries click on a revoked invitaion.
This page has a link to login page.
Fixes: #12629
Co-authored-by: Arunika <arunikayadav42@gmail.com>
clarammdantas