operator v1: create internal admin api port (ClusterIP)

add internal port to ClusterIP service for admin-api.
this allows tools to "just" talk to the ClusterIP service, without
thinking about individual brokers.

See also redpanda-data/redpanda#23424
That core PR fixes redirects. Before, core couldn't redirect to the
correct broker if you used a hostname that is not exactly a broker.

operator/internal/controller/vectorized/cluster_controller.go

@@ -1104,6 +1104,10 @@ func collectClusterPorts(
 		port := redpandaPorts.KafkaAPI.Internal.Port
 		clusterPorts = append(clusterPorts, resources.NamedServicePort{Name: resources.InternalListenerName, Port: port})
 	}
+	if redpandaPorts.AdminAPI.Internal != nil {
+		port := redpandaPorts.AdminAPI.Internal.Port
+		clusterPorts = append(clusterPorts, resources.NamedServicePort{Name: resources.AdminPortName, Port: port})
+	}
 
 	return clusterPorts
 }

operator/tests/e2e/kafka-api-cluster-service-internal/00-assert.yaml

@@ -32,6 +32,10 @@ spec:
       port: 9092
       protocol: TCP
       targetPort: 9092
+    - name: admin
+      port: 9644
+      protocol: TCP
+      targetPort: 9644
   type: ClusterIP
 ---
 apiVersion: kuttl.dev/v1beta1