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/Services/ServiceManagement/WebSocketInterface/data_manager.cpp

@@ -51,7 +51,7 @@ LtsWebSocket::ReplyMessage *DataManager::servicesInformation(const QString &uuid
 
     for (ServiceProcess *service : serviceProcs)
     {
-      if (service->ports().is_set())
+      if (service->ports().has_value())
       {
         ServicePortsInformationMessage::ServiceInformation serviceInfo;
         serviceInfo.name = service->serviceName();