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/TrainingAreaBase/Plugins/UAS/plugin_instance.cpp

@@ -24,7 +24,7 @@
 namespace UAS
 {
 TmsIfModuleHandle::TmsIfModuleHandle() : m_handle(ModuleLoader::load(QString(QCoreApplication::applicationDirPath() + QStringLiteral("/../lib/")).toStdString())),
-    m_logger(NGL::NGLLoggerBootstrap::getLogger()) {}
+    m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger()) {}
 
 
 TmsIfModuleHandle::~TmsIfModuleHandle()