Merge pull request kubernetes#6892 from Shubham82/cherry-picked-of-#6…

…528-upstream-cluster-autoscaler-release-1.28

Backport kubernetes#6528 [CA] Fix expectedToRegister to respect instances with nil status into CA1.28

cluster-autoscaler/clusterstate/clusterstate.go

@@ -1010,7 +1010,7 @@ func getNotRegisteredNodes(allNodes []*apiv1.Node, cloudProviderNodeInstances ma
 }
 
 func expectedToRegister(instance cloudprovider.Instance) bool {
-	return instance.Status != nil && instance.Status.State != cloudprovider.InstanceDeleting && instance.Status.ErrorInfo == nil
+	return instance.Status == nil || (instance.Status.State != cloudprovider.InstanceDeleting && instance.Status.ErrorInfo == nil)
 }
 
 // Calculates which of the registered nodes in Kubernetes that do not exist in cloud provider.