add telemetry disable to opampextension too

Author: Dylan-M

cmd/opampsupervisor/supervisor/templates/opampextension.yaml

@@ -13,3 +13,9 @@ extensions:
 
 service:
   extensions: [opamp]
+
+  telemetry:
+    # Disable agents own telemetry to avoid port binding collisions for port 8888. Bindplane
+    # will enable metrics and configure the port when a configuration is pushed to the agent.
+    metrics:
+      level: none