pod-metric: adds availability zone label to pod metrices

Signed-off-by: Thilina Madumal <[email protected]>

Author: Thilina Madumal

cluster/config-defaults.yaml

@@ -1070,7 +1070,7 @@ observability_metrics_pods_labels: "application,component,version,environment,st
 
 observability_metrics_ingresses_labels: ""
 
-observability_metrics_pods_annotations: "zalando.org/zmon-job-metric-stored"
+observability_metrics_pods_annotations: "zalando.org/zmon-job-metric-stored,topology.kubernetes.io/zone"
 
 # opentelemetry collector
 observability_otel_collector_enabled: "true"