Automatic merge from submit-queue (batch tested with PRs 65156, 65448). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
[GCE] move NEG out of featuregate
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes # https://github.com/kubernetes/ingress-gce/issues/274
**Release note**:
-->
```release-note
NONE
```