Automatic merge from submit-queue (batch tested with PRs 61010, 61315, 62268). 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>.

make use of clientretry.RetryOnConflict in route controller

**What this PR does / why we need it**:

use the common clientretry.RetryOnConflict instead of  ` for i := 0; i < updateNodeStatusMaxRetries; i++ {`


**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```