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/OcSituationClient/central_aes_byte_reader.cpp

@@ -17,7 +17,7 @@ namespace OcSituationClient
 {
 
 CentralAesByteReader::CentralAesByteReader(const QByteArray &data) : m_data(data),
-    m_logger(NGL::NGLLoggerBootstrap::getLogger()) {}
+    m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger()) {}
 
 bool CentralAesByteReader::getRemoveMessage(size_t &pos, CentralAesByteReader::RemoveMessage &removeMessage) const
 {