Limit to groups in federated target server breaks federation

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Steps to reproduce

1. Admin of nc2 enables federation and sets the following settings:
   
   user2 is both in groups admin and general.
2. user1@nc1 invites user2@nc2 into a federated conversation

Expected behaviour

Successful creation of a federated conversation. Limit to groups should limit the possibility to invite, not to be invited and in any case user2 is part of the groups allowed to use federation.

Removing all groups from "Limit to groups" prevents the issue.

Actual behaviour

Conversation is not created or invite fails.
nc2 logs:

Received a federation invite for user that is not allowed to use Talk Federation

No files, tests, or entry points are identified. Reproduce the invite between nc1 and nc2 with a user in both an allowed and another group, then trace the federation authorization handling that produces the logged rejection. Done means an allowed user can be invited and the federated conversation is created while the group limit still restricts outgoing invitations.