Overview:

Investigation of a CI failure has uncovered that our `retry-kubectl.sh` wrapper does not retry on issues such as:

Error from server (InternalError): error when creating "/go/src/github.com/stackrox/stackrox/deploy/k8s/scanner-deploy/scanner-v4/02-scanner-v4-06-db-pvc.yaml": an error on the server ("Internal Server Error: \"/api/v1/namespaces/stackrox/persistentvolumeclaims?fieldManager=kubectl-client-side-apply&fieldValidation=Strict\": the server is currently unable to handle the request") has prevented the request from succeeding (post persistentvolumeclaims)

Acceptance Criteria:

Extend our `retry-kubectl.sh` script to also retry on errors containing `the server is currently unable to handle the request`.