Automatic merge from submit-queue (batch tested with PRs 47302, 47389, 47402, 47468, 47459)

Change port on which fluentd exposes its metrics

Fix https://github.com/kubernetes/kubernetes/issues/47397

/cc @Q-Lee @nicksardo

```release-note
Stackdriver Logging deployment exposes metrics on node port 31337 when enabled.
```