Complete Qt6 migration: full clean build green across groups G1-G12 incl. runtime plugin set

new_docker_build.sh gains Group 12 (212 GUI/Data plugins); fixes LtsUtilsGuiDds visibility (LTO-stripped exports), LtsProjectionWorkstation unity name shadow, 6 unity-off dirs (dup file-scope statics, ddsftc INTERFACE sources) and reconfigures BUILD_FILTERMANAGEMENT/BUILD_PLUGINS_SERVICEMONITOR=ON

qt6-after/qt6-migrated-legatus/Lts/Plugins/ServiceMonitor/Gui/SystemMonitor/smo_system_monitor_dialog.cpp

@@ -3,7 +3,7 @@
 
 #include "smo_system_monitor_dialog.h"
 #include "ui_smo_system_monitor_dialog.h"
-#include <QWebEngineView>
+#include <QtWebEngineWidgets/QWebEngineView>
 #include <LtsUtilsSettings/settings.h>
 
 namespace ServiceMonitor