[cern] Enable K8s Central Monitoring

• Add label metrics_producer to identify the metrics producing cluster when monit team scrapes said cluster
• Add label to specify metric_producer_version OS-8917

magnum/drivers/common/templates/kubernetes/fragments/write-heat-params-master.yaml

@@ -95,6 +95,8 @@ write_files:
       LOGGING_HTTP_DESTINATION="$LOGGING_HTTP_DESTINATION"
       LOGGING_PRODUCER="$LOGGING_PRODUCER"
       LOGGING_VERSION="$LOGGING_VERSION"
+      METRICS_PRODUCER="$METRICS_PRODUCER"
+      METRICS_PRODUCER_VERSION="$METRICS_PRODUCER_VERSION"
       CERN_TAG="$CERN_TAG"
       KUBE_CSI_ENABLED="$KUBE_CSI_ENABLED"
       KUBE_CSI_VERSION="$KUBE_CSI_VERSION"