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/Proxies/TrainingAreaBase/send_to_dds.cpp

@@ -262,7 +262,7 @@ void SendToDds::rxData(const TetraIcd::StateChangeDirect &inData)
   {
     TetraIcd::MineTriggered mt;
     mt.header.timeStamp = inData.header.timeStamp;
-    if (outData.position.is_set())
+    if (outData.position.has_value())
     {
       const TrainingAreaBase::TabPosition pos = outData.position.get();
       mt.relPosition = m_posHandler->geographicToRelative(pos.position);
@@ -1108,7 +1108,7 @@ bool SendToDds::setPosition(T &data,
       }
 
       if (lastPosition.reportingSource == Core::PositionReportingSource::Ops &&
-          lastPosition.moutObjectId.is_set())
+          lastPosition.moutObjectId.has_value())
       {
         DEBUG_LOG(m_logger) << "Check leave Building equipmentNumber=" << data.equipmentNumber;
         DEBUG_LOG(m_logger) << "relPos=" << relPos.offsetX << "/" << relPos.offsetY;