Update references from k8s.gcr.io to registry.k8s.io

[vaibhav2107]

Fixes: #1583
Ref: kubernetes/k8s.io#4738

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[cdrage]

CI has passed, LGTM! Thank you.

/lgtm

[cdrage]

/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cdrage, vaibhav2107

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[vaibhav2107]

Thanks @cdrage