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/AlarmManagement/handler_participant.cpp

@@ -64,7 +64,7 @@ bool HandlerParticipant::init()
   {
     const ParticipantManagement::Participant &participant = i.value();
 
-    if (participant.equipmentNumber.is_set())
+    if (participant.equipmentNumber.has_value())
     {
       m_partId2EquipNoMap.insert(participant.id, participant.equipmentNumber.get());
       DEBUG_LOG(m_logger) << "m_partId2EquipNoMap.insert participantId=" << participant.id << "EquimentNo=" << participant.equipmentNumber.get();
@@ -110,7 +110,7 @@ void HandlerParticipant::onParticipantChanged(const ParticipantManagement::Parti
     DEBUG_LOG(m_logger) << "onParticipantChanged:" << data;
     m_participantHierarchy.insert(data.id,
                                   AlarmManagement::HandlerParticipant::ParticipantHierarchy(data));
-    const int equipNo = data.equipmentNumber.is_set() ? data.equipmentNumber.get() : 0;
+    const int equipNo = data.equipmentNumber.has_value() ? data.equipmentNumber.get() : 0;
     m_partId2EquipNoMap.insert(data.id, equipNo);
 
   }