feat: stamp Queue shard status with availability zones

Resolves each shard topic's replica broker IDs (internal/kafka.Admin.
ReplicaBrokerIDs) to the topology.kubernetes.io/zone labels of the nodes
hosting those brokers (ZoneLocator), and writes the result into
ShardStatus.AvailabilityZones each reconcile. Uses mgr.GetAPIReader()
rather than the cached client for the Pod/Node lookups, since the cached
client would otherwise require cluster-wide list/watch RBAC on Pods just
to serve occasional point Gets.

k8s/charts/queue-crd/templates/operator-deployment.yaml

@@ -25,5 +25,13 @@ spec:
               value: {{ .Values.redisAddr | quote }}
             - name: GOMEMLIMIT
               value: {{ .Values.goMemLimit | quote }}
+            - name: KMSVC_NAMESPACE
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.namespace
+            - name: KMSVC_KAFKA_CLUSTER_NAME
+              value: {{ .Values.kafkaClusterName | quote }}
+            - name: KMSVC_KAFKA_POOL_NAME
+              value: {{ .Values.kafkaPoolName | quote }}
           resources:
             {{- toYaml .Values.resources | nindent 12 }}