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/PlanEditor/model_tree_widget.cpp

@@ -14,7 +14,7 @@
 #include <QtGui/QKeyEvent>
 
 #include <QtWidgets/QAbstractItemView>
-#include <QtWidgets/QAction>
+#include <QtGui/QAction>
 #include <QtWidgets/QApplication>
 #include <QtWidgets/QGroupBox>
 #include <QtWidgets/QHBoxLayout>