Fix issues caused by bug on kiwigrid

- Kiwigrid has an issue with SSL, which deletes all dashboards from
  grafana.
- Downgrading to a working version (from 1.30.5 to 1.30.3)
- Link of the bug: kiwigrid/k8s-sidecar#400

Signed-off-by: V. Aret <[email protected]>

Author: varet80

charts/grafana/values.yaml

@@ -959,7 +959,7 @@ sidecar:
     # -- The Docker registry
     registry: quay.io
     repository: kiwigrid/k8s-sidecar
-    tag: 1.30.5
+    tag: 1.30.3
     sha: ""
   imagePullPolicy: IfNotPresent
   resources: {}