Enh: clusterDecisionResource should also provide labels/annotations, like regular cluster generator

[hans-d]

The cluster generator provides labels and annotations from the selected/generated clusters.
These can be used in the template.

The clusterDecisionResource does only provide data provided in referenced resource from which the decision is made. It would be very beneficial if labels/annotations from the cluster resource from argo cd are provided as well.

[crenshaw-dev]

I think this could be done with the new merge generator. Use a ClusterDecisionResource generator to as the base generator and then merge with a Cluster generator on the server param.