/kind bug

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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.

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Environment:

• Kubeflow version (kfctl version):
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