feat: add more allowed values in registry groups

From: https://mattermost.web.cern.ch/diracx/pl/qqe49rd8stb7fkbfssj877z67h

We need to add at least VO key in DIRAC Groups to avoid diracx error:

RuntimeError('Error getting token from DiracX: 400 {"detail":"Invalid scope or preferred_username"}'): Error getting token from DiracX: 400 {"detail":"Invalid scope or preferred_username"}