Rudder

Since #25841, the instance ID of a Rudder server and all nodes within its cluster allow to identify different clusters.
When doing backups and importing archives from a cluster to another (on two different servers), it would be practical to have group criteria that are not valid from one server to another.

To be able to do that, we could add a new criteria Node summary > Instance ID with equals | not equals comparison, that would automatically be filled with the current instance identifier.
When importing groups with such criterion being defined, the comparison should short-circuit the group search to return an empty list of nodes on a different server.