Add cnv_abnormal

cnv_abnormal holds issues with the pods for each container, e.g. memory
exceeded value.

Signed-off-by: avlitman <alitman@redhat.com>

manifests/0000_50_cluster-monitoring-operator_04-config.yaml

@@ -240,6 +240,12 @@ data:
     #
     # owners: (https://github.com/kubevirt)
     #
+    # cnv_abnormal represents the reason why the operator might have an issue
+    # and includes the node, namespace, container, reason labels.
+    - '{__name__="cnv_abnormal"}'
+    #
+    # owners: (https://github.com/kubevirt)
+    #
     # cluster:vmi_request_cpu_cores:sum is the total number of CPU cores requested by pods of VMIs.
     - '{__name__="cluster:vmi_request_cpu_cores:sum"}'
     #