Remove support for Kubernetes 1.23

[johngmyers]

No description provided.

[johngmyers]

/test pull-kops-e2e-cni-flannel
/test pull-kops-e2e-cni-kuberouter

[johngmyers]

/test pull-kops-e2e-aws-karpenter

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hakman

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[k8s-ci-robot]

@johngmyers: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-kops-e2e-cni-amazonvpc	b3908e5	link	false	/test pull-kops-e2e-cni-amazonvpc

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[johngmyers]

/test pull-kops-e2e-cni-calico-ipv6