kubeadm: remove jobs for the "patches" functionality for N-x versions

[neolit123]

We can only test patches at the k/k "master" level
to avoid having too many test jobs.

Ideally we should not backport "patches" fixes
to the old branches, unless they are already present
at k/k master.

xref kubernetes/kubeadm#1682
kubernetes/kubeadm#2707

/kind feature cleanup

[neolit123]

/cc @pacoxu @RA489

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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[RA489]

/lgtm
/hold for another eye @pacoxu

[pacoxu]

/hold cancel
/lgtm

[k8s-ci-robot]

@neolit123: Updated the job-config configmap in namespace default at cluster test-infra-trusted using the following files:

• key kubeadm-kinder-patches.yaml using file config/jobs/kubernetes/sig-cluster-lifecycle/kubeadm-kinder-patches.yaml

In response to this:

We can only test patches at the k/k "master" level
to avoid having too many test jobs.

Ideally we should not backport "patches" fixes
to the old branches, unless they are already present
at k/k master.

xref kubernetes/kubeadm#1682
kubernetes/kubeadm#2707

/kind feature cleanup

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