Issues when reconnect a delegate

[bingwei-hong-partior]

1. when a delegate is disconnected from chaosCenter, the services (workflow-controller, cahos-operator etc) still running in the delegate cluster. Unable to reconnect using the existing namespace and service account, as it will complain a delegate is existed.
   How do we reconnect using the existing delegate back to the chaosCenter? or the only option is to undeploy all the related services and start from litmusctl connect chaos-delegate command again?

2. when reconnect a delegate, it will always assigned with a new delegate ID, which means all the previously configured scenarios cannot be used, will have to re-create again. Any future enhancement to allow reconnect a delegate with existing delegate-id?