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/ExerciseManagement/UnitTests/initialisation.cpp

@@ -22,7 +22,7 @@ Initialisation::Initialisation() : m_domainParticipant(nullptr)
   , m_ddsSubscriber(nullptr)
   , m_subListener(new DTC::SubscriberListener)
   .getNGLLogger("UnitTests.Initialisation")),
-    m_logger(NGL::NGLLoggerBootstrap::getLogger()) {  
+    m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger()) {  
   DDS::DefaultQos defaultQos;
 
   //if (!defaultQos.setDefaultQos(QStringList("/shd/CTC/SV/.default_dds_profile.xml")))