ci: Attempt to fix CI e2e test error

* Use world readwrite permissions on grafana plugins folder in dockerfile

Signed-off-by: Mahendra Paipuri <mahendra.paipuri@gmail.com>

.config/Dockerfile

@@ -16,8 +16,8 @@ ENV GF_AUTH_BASIC_ENABLED "false"
 # Set development mode so plugins can be loaded without the need to sign
 ENV GF_DEFAULT_APP_MODE "development"
 
-# Create a group and user
-# RUN addgroup -S grafana && adduser -S grafana -G grafana
+# Set permissions to /var/lib/grafana/plugins folder
+RUN chmod 0777 /var/lib/grafana && chmod 0777 /var/lib/grafana/plugins
 
 # Tell docker that all future commands should run as the grafana user
 USER grafana