Qt6 Migration: BUILD_RTI guards und CMake fixes

- BUILD_RTI conditional compilation für RTI Connext DDS dependencies
- Namespace fixes in core_dtc.h (Core:: → DDS::Core::)
- CMakeLists.txt: BUILD_RTI option und conditional dependencies
- Handler minelayer: namespace closing mit BUILD_RTI guard
- Build erfolgreich mit BUILD_RTI=OFF validiert

Signed-off-by: Torsten Wierschin <torsten.wierschin@life-maps.com>

qt6-after/qt6-migrated-legatus/Lts/Services/OcSituationServer/position_converter.cpp

@@ -19,7 +19,7 @@ PositionConverter::PositionConverter(MainHandler *m_mainHandler) : m_mainHandler
   , m_baseCoord(LtsCoordTrans::UtmCoordinate())
   , m_asmDtc(AssetManagement::Interface::Dtc::create(m_mainHandler->dds()->dds()))
   , m_exmDtc(ExerciseManagement::Interface::Dtc::create(m_mainHandler->dds()->dds())),
-    m_logger(NGL::NGLLoggerBootstrap::getLogger()) {
+    m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger()) {
   m_exmDtc->enableExercise();
   m_asmDtc->enableTrainingArea();
 }