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/Proxies/TrainingAreaBaseOC/send_to_dds.cpp

@@ -14,7 +14,7 @@ SendToDds::SendToDds(MainHandler *mainHandler) : m_dtsTaboc(mainHandler->dds()->
   , m_dtsTab(mainHandler->dds()->dtsTab())
   , m_utmCoord(LtsCoordTrans::UtmCoordinate())
   , m_idToSend(1),
-    m_logger(NGL::NGLLoggerBootstrap::getLogger()) {}
+    m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger()) {}
 
 void SendToDds::rxData(const OcTelegrams::Display &inData)
 {