Add termination hook to the startup script - GCE Windows

cluster/gce/windows/configure.ps1

@@ -205,5 +205,8 @@ catch {
   Write-Host 'Exception caught in script:'
   Write-Host $_.InvocationInfo.PositionMessage
   Write-Host "Kubernetes Windows node setup failed: $($_.Exception.Message)"
+  # Make sure kubelet won't remain running in case any failure happened during the startup.
+  Write-Host "Cleaning up, Unregistering WorkerServices..."
+  Unregister-WorkerServices
   exit 1
 }

cluster/gce/windows/k8s-node-setup.psm1

@@ -1286,6 +1286,12 @@ function Start-WorkerServices {
   Log-Output "Kubernetes components started successfully"
 }
 
+# Stop and unregister both kubelet & kube-proxy services.
+function Unregister-WorkerServices {
+  & sc.exe delete kube-proxy
+  & sc.exe delete kubelet
+}
+
 # Wait for kubelet and kube-proxy to be ready within 10s.
 function WaitFor_KubeletAndKubeProxyReady {
   $waited = 0