Set fluentd log level to warn.
Set fluentd log level to warn.

Tested: minikube on personal project
b/227983425

Change-Id: I6e00703202cf347b05558ba6c0ff531932eb65b5
GitOrigin-RevId: 3095d1160de9d381298a389098aa837223f97289

googlecloudrobotics/core,googlecloudrobotics/core,googlecloudrobotics/core