refactor(e2e): optimize test timing

- Reduce curl pod sleep from 3600s to 300s
- Remove unnecessary time.Sleep after operator restart

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: ZiyangLinScality

test/e2e/framework/mock_client.go

@@ -86,7 +86,7 @@ func (c *MockServerClient) ensureCurlPod(ctx context.Context, namespace string)
 		"--image-pull-policy=IfNotPresent",
 		"--command",
 		"--",
-		"sleep", "3600",
+		"sleep", "300",
 	}
 	cmd := exec.CommandContext(ctx, "kubectl", args...)
 	var stdout, stderr bytes.Buffer

test/e2e/pod_lifecycle_test.go

@@ -303,8 +303,6 @@ func TestPodLifecycle_OperatorCrashRecovery(t *testing.T) {
 			componentName := ctx.Value(podLifecycleComponentKey).(string)
 			exposerName := ctx.Value(podLifecycleExposerKey).(string)
 
-			time.Sleep(5 * time.Second)
-
 			if err := framework.WaitForScalityUIReady(ctx, client, scalityUIName, framework.DefaultTimeout); err != nil {
 				t.Fatalf("ScalityUI not ready after recovery: %v", err)
 			}