kubeadm: fix the bug that --image-repository flag is missing for some init phase sub-commands

cmd/kubeadm/app/cmd/phases/init/kubelet.go

@@ -46,6 +46,7 @@ func NewKubeletStartPhase() workflow.Phase {
 		Run:     runKubeletStart,
 		InheritFlags: []string{
 			options.CfgPath,
+			options.ImageRepository,
 			options.NodeCRISocket,
 			options.NodeName,
 			options.Patches,

cmd/kubeadm/app/cmd/phases/init/preflight.go

@@ -46,6 +46,7 @@ func NewPreflightPhase() workflow.Phase {
 		Run:     runPreflight,
 		InheritFlags: []string{
 			options.CfgPath,
+			options.ImageRepository,
 			options.NodeCRISocket,
 			options.IgnorePreflightErrors,
 			options.DryRun,