Upgrade CRDs to apiextensions.k8s.io/v1

[alculquicondor]

The api group apiextensions.k8s.io/v1beta1 is no longer served in k8s 1.22 https://kubernetes.io/docs/reference/using-api/deprecation-guide/#customresourcedefinition-v122

kubeflow APIs need to be upgraded

[gaocegege]

SGTM.

[gaocegege]

Ref https://github.com/kubeflow/tf-operator/blob/master/manifests/base/crds/kubeflow.org_tfjobs.yaml#L3

CRD is upgraded already, I think we can close it safely.

[stale]

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