e2e: wait for deployment before scale down/up

The scale down/up functions fail often with "deployment not found"
errors. Possibly deploying with Podman is slower than deploying in a
minikube VM, and there is a delay for the deployment to become
available.

Signed-off-by: Niels de Vos <ndevos@redhat.com>

e2e/deployment.go

@@ -390,6 +390,12 @@ func waitForContainersArgsUpdate(
 ) error {
 	e2elog.Logf("waiting for deployment updates %s/%s", ns, deploymentName)
 
+	// wait for the deployment to be available
+	err := waitForDeploymentInAvailableState(c, deploymentName, ns, deployTimeout)
+	if err != nil {
+		return fmt.Errorf("deployment %s/%s did not become available yet: %w", ns, deploymentName, err)
+	}
+
 	// Scale down to 0.
 	scale, err := c.AppsV1().Deployments(ns).GetScale(context.TODO(), deploymentName, metav1.GetOptions{})
 	if err != nil {