Aggregate Barman Cloud Plugin's ClusterRole to Kubernetes default user-facing roles

[mrchrd]

The Barman Cloud Plugin does not allow the aggregation labels, as does the CloudNativePG operator. I would expect to see the option rbac.aggregateClusterRoles in values.yaml and the labels rbac.authorization.k8s.io/aggregate-to-view, rbac.authorization.k8s.io/aggregate-to-edit, and rbac.authorization.k8s.io/aggregate-to-admin to be set for the Barman Cloud Plugin's ClusterRole so that a Kubernetes admin can manage ObjectStore resources.