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/MeteoDataManagement/handler_infrastructure_data.cpp

@@ -19,7 +19,7 @@ HandlerInfrastructureData::HandlerInfrastructureData(const std::shared_ptr<DdsHa
                                                      QObject *parent) : QObject(parent)
   , m_ddsHandler(ddsHandler)
   , m_handlerMeteoDataUnits(handlerMeteoDataUnits),
-    m_logger(NGL::NGLLoggerBootstrap::getLogger()) {
+    m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger()) {
 } // end of ctor()
 //-----------------------------------------------------------------------------