Add new CEL ValidationRules to alpha features we e2e test

[jpbetz]

This appears to be the primary test we use to test alpha features. It's accessible via /test pull-kubernetes-e2e-gce-alpha-features.

Feature being tested: https://github.com/kubernetes/enhancements/tree/master/keps/sig-api-machinery/2876-crd-validation-expression-language

[jpbetz]

@cheftako I got a request to add alpha e2e testing of the CEL alpha feature. I'm a bit unclear on why the only alpha feature test job is under sig-cloud-provider of it it's the right job to add tests to, but I couldn't find any else and it appears that this job runs some alpha feature tests that are not cloud provider specific, so maybe this is the right place.

[cheftako]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cheftako, jpbetz

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[jpbetz]

/hold

[jpbetz]

/hold cancel

[k8s-ci-robot]

@jpbetz: Updated the job-config configmap in namespace default at cluster test-infra-trusted using the following files:

• key gcp-gce.yaml using file config/jobs/kubernetes/sig-cloud-provider/gcp/gcp-gce.yaml

In response to this:

This appears to be the primary test we use to test alpha features. It's accessible via /test pull-kubernetes-e2e-gce-alpha-features.

Feature being tested: https://github.com/kubernetes/enhancements/tree/master/keps/sig-api-machinery/2876-crd-validation-expression-language

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