Remove ci-kubernetes-node-kubelet-serial/-flaky jobs
Remove ci-kubernetes-node-kubelet-serial/-flaky jobs

These are covered by ci-kubernetes-node-kubelet-serial-containerd and
ci-kubernetes-node-kubelet-serial-cri-o jobs. DevicePluginProbe tests
should be readded in a follow-up; they are currently failing. See
https://github.com/kubernetes/kubernetes/issues/106635

fejta/test-infra,dims/test-infra,michelle192837/test-infra,fejta/test-infra,fejta/test-infra,monopole/test-infra,monopole/test-infra,jessfraz/test-infra,cblecker/test-infra,cjwagner/test-infra,kubernetes/test-infra,michelle192837/test-infra,michelle192837/test-infra,dims/test-infra,BenTheElder/test-infra,dims/test-infra,BenTheElder/test-infra,cjwagner/test-infra,kubernetes/test-infra,michelle192837/test-infra,kubernetes/test-infra,jessfraz/test-infra,monopole/test-infra,kubernetes/test-infra,cblecker/test-infra,michelle192837/test-infra,cjwagner/test-infra,jessfraz/test-infra,dims/test-infra,kubernetes/test-infra,cjwagner/test-infra,cblecker/test-infra,dims/test-infra,cblecker/test-infra,cjwagner/test-infra,jessfraz/test-infra,michelle192837/test-infra,monopole/test-infra,cblecker/test-infra,fejta/test-infra,fejta/test-infra,monopole/test-infra,cjwagner/test-infra,monopole/test-infra,BenTheElder/test-infra,cblecker/test-infra,BenTheElder/test-infra,jessfraz/test-infra,BenTheElder/test-infra,fejta/test-infra,kubernetes/test-infra,BenTheElder/test-infra,jessfraz/test-infra,dims/test-infra