Merge pull request #9700 from k8s-infra-cherrypick-robot/cherry-pick-9698-to-release-1.4

[release-1.4] 🐛 Allow dropping patches KubeadmControlPlane KubeadmConfig

Author: k8s-ci-robot

controlplane/kubeadm/api/v1beta1/kubeadm_control_plane_webhook.go

@@ -156,10 +156,12 @@ func (in *KubeadmControlPlane) ValidateUpdate(old runtime.Object) error {
 		{spec, kubeadmConfigSpec, initConfiguration, nodeRegistration},
 		{spec, kubeadmConfigSpec, initConfiguration, nodeRegistration, "*"},
 		{spec, kubeadmConfigSpec, initConfiguration, patches, directory},
+		{spec, kubeadmConfigSpec, initConfiguration, patches},
 		{spec, kubeadmConfigSpec, initConfiguration, skipPhases},
 		{spec, kubeadmConfigSpec, joinConfiguration, nodeRegistration},
 		{spec, kubeadmConfigSpec, joinConfiguration, nodeRegistration, "*"},
 		{spec, kubeadmConfigSpec, joinConfiguration, patches, directory},
+		{spec, kubeadmConfigSpec, joinConfiguration, patches},
 		{spec, kubeadmConfigSpec, joinConfiguration, skipPhases},
 		{spec, kubeadmConfigSpec, preKubeadmCommands},
 		{spec, kubeadmConfigSpec, postKubeadmCommands},