EDGEPOD-34 Add ability to configure Grafana dashboards to import

Also, bump Prometheus and Grafana helm chart version.

Change-Id: I74ab2f8d70671fa3ccaf2efab2de107c0c5d47b5
diff --git a/nem-monitoring/grafana-dashboards/omec.json b/nem-monitoring/grafana-dashboards/omec.json
index efb1c90..69b657c 100644
--- a/nem-monitoring/grafana-dashboards/omec.json
+++ b/nem-monitoring/grafana-dashboards/omec.json
@@ -464,7 +464,9 @@
   "refresh": "5s",
   "schemaVersion": 16,
   "style": "dark",
-  "tags": [],
+  "tags": [
+    "comac"
+  ],
   "templating": {
     "list": [
       {