add replaceBeforeVersion field for channel

[johngmyers]

This is resurrecting #8722. The original contributor gave up.

This is needed in order to change the targetPorts for the kube-dns Service, as kubectl apply does not work for changing the targetPorts of a Service that has two ports with the same port but different protocols.

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[olemarkus]

/hold

sorry, but can this wait for #11712?

[k8s-ci-robot]

@johngmyers: PR needs rebase.

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/lifecycle stale

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/lifecycle rotten

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@johngmyers: The following tests 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-flannel	81ba782	link	true	/test pull-kops-e2e-cni-flannel
pull-kops-e2e-cni-canal	81ba782	link	true	/test pull-kops-e2e-cni-canal
pull-kops-e2e-cni-cilium-ipv6	81ba782	link	true	/test pull-kops-e2e-cni-cilium-ipv6
pull-kops-e2e-cni-calico-ipv6	81ba782	link	true	/test pull-kops-e2e-cni-calico-ipv6

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/close

[k8s-ci-robot]

@k8s-triage-robot: Closed this PR.

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/close

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