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/ComponentMonitor/checkmk_handler.cpp

@@ -16,7 +16,7 @@ namespace ComponentMonitor
 
 CheckmkHandler::CheckmkHandler() : QObject()
   , m_socket(new QTcpSocket(this)),
-    m_logger(NGL::NGLLoggerBootstrap::getLogger()) {
+    m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger()) {
   TRACE_LOG(m_logger) << Q_FUNC_INFO << " START";
   TRACE_LOG(m_logger) << Q_FUNC_INFO << " END";
 }