chore: Unset OTel endpoints (#1248)

Currently we set OTel endpoint by default, which will be picked up by
the controller and will be propagated into any Agent created by the
controller.

This PR unsets these to avoid confusion and overriding what other
projects might set during initialization.

Signed-off-by: krisztianfekete <[email protected]>

Author: krisztianfekete

helm/kagent/values.yaml

@@ -387,13 +387,13 @@ otel:
     enabled: false
     exporter:
       otlp:
-        endpoint: http://host.docker.internal:4317
+        endpoint: ""
         timeout: 15
         insecure: true
   logging:
     enabled: false
     exporter:
       otlp:
-        endpoint: http://host.docker.internal:4317
+        endpoint: ""
         timeout: 15
         insecure: true