update grafana with redis

deploy/grafana/grafana-deploy.yaml

@@ -66,6 +66,10 @@ spec:
                 secretKeyRef:
                   name: grafana-db-secret
                   key: password
+            - name: GF_SESSION_PROVIDER
+              value: "redis"
+            - name: GF_SESSION_PROVIDER_CONFIG
+              value: "redis://redis-lb.redis.svc.cluster.local:6379"
           resources:
             requests:
               cpu: 250m