fix(e2e): Fix subscription manual approval flaky test

The current Subscription manual approve e2e test has an extra Apply
code that needs to the InstallPlan being updated twice by accident.
This causes the test case to be flaky.

Signed-off-by: Vu Dinh <[email protected]>

Author: dinhxuanvu

test/e2e/subscription_e2e_test.go

@@ -249,9 +249,6 @@ var _ = Describe("Subscription", func() {
 			return nil
 		})).Should(Succeed())
 
-		_, err = crc.OperatorsV1alpha1().InstallPlans(testNamespace).Update(context.Background(), newInstallPlan, metav1.UpdateOptions{})
-		require.NoError(GinkgoT(), err)
-
 		subscription, err = fetchSubscription(crc, testNamespace, "manual-subscription", subscriptionStateAtLatestChecker)
 		require.NoError(GinkgoT(), err)
 		require.NotNil(GinkgoT(), subscription)