CloudBees Replication Parent 1926

In a High Availability (HA) controller, changes made to the permanent agents using the multi-executor option (additions, deletions, reconfigurations) while the controller is running are reflected in the list of read-only clones. However, applying jenkins.yaml from a CasC bundle that includes the jenkins.nodes section could change the list of agents without triggering the correct notifications, resulting in some cases in orphaned clones that could not be readily deleted. Now, a controller replica will explicitly check for orphaned clones during startup and remove them.