Added two complex prefab tests (#5089)

* Added two complex prefab tests

* Fix compile error

* Added extra methods, fixed test failure

* Addressed PR commments

* More PR comments

* Fix space

* Fix ar error

Code/Editor/CryEdit.cpp

@@ -4137,7 +4137,15 @@ extern "C" int AZ_DLL_EXPORT CryEditMain(int argc, char* argv[])
     AzQtComponents::Utilities::HandleDpiAwareness(AzQtComponents::Utilities::SystemDpiAware);
     Editor::EditorQtApplication* app = Editor::EditorQtApplication::newInstance(argc, argv);
 
-    if (app->arguments().contains("-autotest_mode"))
+    QStringList qArgs = app->arguments();
+    const bool is_automated_test = AZStd::any_of(qArgs.begin(), qArgs.end(),
+        [](const QString& elem)
+        {
+            return elem.endsWith("autotest_mode") || elem.endsWith("runpythontest");
+        }
+    );
+
+    if (is_automated_test)
     {
         // Nullroute all stdout to null for automated tests, this way we make sure
         // that the test result output is not polluted with unrelated output data.