Automatic merge from submit-queue (batch tested with PRs 57282, 57484). 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>.
Fix a bug in validating node existence.
**What this PR does / why we need it**:
Fixes an bug where if an error was returned that was not an `autorest.DetailedError` we would return `"not found", nil` which would result in Nodes going `NotReady`
**Which issue(s) this PR fixes**
Fixes#57483
**Release note**:
```release-note
Fixes an bug where if an error was returned that was not an `autorest.DetailedError` we would return `"not found", nil` which caused nodes to go to `NotReady` state.
```
@feiskyer @khendiak
1bcf0b0a22