In heterogeneous environments where the hub manages both openshift and *KS spokes, the addon should only be deployed on openshift spokes.
This is achieved by changing the default placement used in the ClusterManagementAddon from `global` to a custom one with a predicate like:

spec: 
  clusterSets: 
    - global
  predicates: 
    - requiredClusterSelector: 
        labelSelector: 
          matchLabels: 
            vendor: OpenShift