Define status.deadLetterSinkUri in KafkaChannel CRD (#1137)

Co-authored-by: Ali Ok <aliok@redhat.com>

config/channel/resources/kafkachannel-crd.yaml

@@ -202,6 +202,9 @@ spec:
                     namespace:
                       description: 'Namespace of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/ This is optional field, it gets defaulted to the object holding it if left out.'
                       type: string
+                deadLetterSinkUri:
+                  description: DeadLetterSinkURI is the resolved URI of the dead letter ref if one is specified in the Spec.Delivery.
+                  type: string
                 observedGeneration:
                   description: ObservedGeneration is the 'Generation' of the Service that was last processed by the controller.
                   type: integer