As of today, site admin status is given by being project administrator of the project of id 1, "Administration Project"
Given that removing the "Administration Project" of id 1 is possible AND locks admin out to the point that they need to restore a backup (see
request #10097), we should aim to remove the "admin project" and use a safer way to store site admin status.
This is going to be a long process, there are many checks almost everywhere in the platform for membership of project 1.