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/Buildings/building_control_handler.cpp

@@ -219,7 +219,7 @@ Core::FunctionReplyObject BuildingControlHandler::onSetBuildingStatesRequestInte
 
     BuildingProcess *bldg = it.value();
 
-    if (data.resetContamination.is_set())
+    if (data.resetContamination.has_value())
     {
       if (data.resetContamination.get() && !bldg->resetContaminationState())
         return Core::FunctionReplyObject(building.buildingId, tr_lts("dds", "reset contamination of building with id %1 failed.")).arg(building.buildingId);
@@ -232,7 +232,7 @@ Core::FunctionReplyObject BuildingControlHandler::onSetBuildingStatesRequestInte
         data.vulnerabilityState != ProjectDataManagement::VulnerabilityState::VulnerabilityState_CombatReady )
       return Core::FunctionReplyObject(building.buildingId, tr_lts("dds", "Building with id %1 not found.")).arg(building.buildingId);
 
-    if (building.roomIds.is_set())
+    if (building.roomIds.has_value())
       roomIds = building.roomIds.get();
 
     if (!bldg->setVulnerabilityState(data.vulnerabilityState, roomIds))