Deleting a PulsarCluster resource immediately starts deleting all the resources

[pgier]

I guess this is probably intentional, but immediately after deleting a PulsarCluster object, the operator starts deleting all the components. I wonder if there should be some kind of setting in the operator to determine the behaviour when a PulsarCluster object is deleted. It might be better to leave the resources orphaned and give the user more options for deleting them. Maybe each cluster should have a flag that determines what happens to the orphaned resources if the cluster is deleted.