Update deprecated api apiextensions.k8s.io/v1beta1

[daftping]

/kind bug

What steps did you take and what happened:
[A clear and concise description of what the bug is.]
Update deprecated api group apiextensions.k8s.io/v1beta1 - code.

https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.16.md#deprecations-and-removals
The apiextensions.k8s.io/v1beta1 version of CustomResourceDefinition is deprecated and will no longer be served in v1.19. Use apiextensions.k8s.io/v1 instead. (#79604, @liggitt)

The CustomResourceDefinition API type is promoted to apiextensions.k8s.io/v1 with the following changes:

• Use of the new default feature in validation schemas is limited to v1
• spec.scope is no longer defaulted to Namespaced and must be explicitly specified
• spec.version is removed; use spec.versions instead
• spec.validation is removed; use spec.versions[*].schema instead
• spec.subresources is removed; use spec.versions[*].subresources instead
• spec.additionalPrinterColumns is removed; use spec.versions[*].additionalPrinterColumns instead
• spec.conversion.webhookClientConfig is moved to spec.conversion.webhook.clientConfig
• spec.conversion.conversionReviewVersions is moved to spec.conversion.webhook.conversionReviewVersions
• spec.versions[*].schema.openAPIV3Schema is now required when creating v1 CustomResourceDefinitions
• spec.preserveUnknownFields: true is disallowed when creating v1 CustomResourceDefinitions; it must be specified within schema definitions as x-kubernetes-preserve-unknown-fields: true
• In additionalPrinterColumns items, the JSONPath field was renamed to jsonPath (fixes v1: CustomResourceColumnDefinition JSONPath should be serialized as "jsonPath" kubernetes/kubernetes#66531)
  The apiextensions.k8s.io/v1beta1 version of CustomResourceDefinition is deprecated and will no longer be served in v1.19.

What did you expect to happen:

Anything else you would like to add:
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Environment:

• Kubeflow version (kfctl version):
• Minikube version (minikube version):
• Kubernetes version: (use kubectl version):
• OS (e.g. from /etc/os-release):

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[andreyvelich]

Thanks for the information @daftping.
@gaocegege @johnugeorge Should we fix it before the 1.2 release?

I am concerned that we use other deprecated APIs. For example, admissionregistration.k8s.io/v1beta1

[gaocegege]

I think we should have a detailed review for this.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[andreyvelich]

/lifecycle frozen

[gaocegege]

kubernetes/apiextensions-apiserver#50

[gaocegege]

We have some problems with v1