Helm chart release chart/kafka-operator/0.2.21-adobe-20200824

Add support for dedicated envoy deployment per brokerConfigGroup

* No LB on envoy

* Add support for dedicated envoy deployment per brokerConfigGroup
- Use a different label for each envoy deployment

* Add support to bring your own Load Balancer
-LB will not be managed by Kafka-Operator.
- HostnameOverride should be mandatory with BringYourOwnLB

* Add external listeners per broker config group

* Create Envoy if all config groups define an EL

Envoy ingress should be created if there is a global
External Listener define, or if each broker config
group defines each own External Listener.
The broker config group External Listener will
always override the global External Listener.

Reconcile External Listeners only if needed.

Fix LoadBalancer overwrite for ExternalListener

LB address / IP should be used if HostnameOverride is not used