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Update the Google API clients used by the GCE provider to identify Kubernetes as the origin of GCP API calls.
**What this PR does / why we need it**:
This modifies the Google API clients used for the GCE provider to identify GCP API calls as originating from Kubernetes.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#39391
**Special notes for your reviewer**:
**Release note**:
```release-note
`NONE`
```
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