e2e: node: wait for kvm plugin removal

we need to make sure the system state is completely cleaned up
again, to avoid to mess up with the shared node state, before
we transition from one test to another.

Signed-off-by: Francesco Romani <fromani@redhat.com>

test/e2e_node/podresources_test.go

@@ -849,6 +849,7 @@ func teardownKubeVirtDevicePluginOrFail(f *framework.Framework, pod *v1.Pod) {
 	err := f.ClientSet.CoreV1().Pods(pod.Namespace).Delete(context.TODO(), pod.Name, deleteOptions)
 
 	framework.ExpectNoError(err)
+	waitForAllContainerRemoval(pod.Name, pod.Namespace)
 }
 
 func findKubeVirtResource(node *v1.Node) int64 {