Fixes: Ship Qt Designer private Headers

Task: 205821
Details: Added script to copy them over, swapping license headers, added directory qt_private.

src/plugins/designer/settingspage.cpp

@@ -34,7 +34,7 @@
 #include "settingspage.h"
 
 #include <extensionsystem/pluginmanager.h>
-#include <QtDesigner/private/abstractoptionspage_p.h>
+#include <qt_private/abstractoptionspage_p.h>
 
 using namespace Designer::Internal;