tests: Refactors agnhost image pod usage in tests

A previous commit created a few agnhost related functions that creates agnhost
pods / containers for general purposes.

Refactors tests to use those functions.

test/e2e/node/pre_stop.go

@@ -44,21 +44,7 @@ type State struct {
 
 func testPreStop(c clientset.Interface, ns string) {
 	// This is the server that will receive the preStop notification
-	podDescr := &v1.Pod{
-		ObjectMeta: metav1.ObjectMeta{
-			Name: "server",
-		},
-		Spec: v1.PodSpec{
-			Containers: []v1.Container{
-				{
-					Name:  "server",
-					Image: imageutils.GetE2EImage(imageutils.Agnhost),
-					Args:  []string{"nettest"},
-					Ports: []v1.ContainerPort{{ContainerPort: 8080}},
-				},
-			},
-		},
-	}
+	podDescr := e2epod.NewAgnhostPod(ns, "server", nil, nil, []v1.ContainerPort{{ContainerPort: 8080}}, "nettest")
 	ginkgo.By(fmt.Sprintf("Creating server pod %s in namespace %s", podDescr.Name, ns))
 	podDescr, err := c.CoreV1().Pods(ns).Create(context.TODO(), podDescr, metav1.CreateOptions{})
 	framework.ExpectNoError(err, fmt.Sprintf("creating pod %s", podDescr.Name))