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/Plugins/Buildings/Gui/BuildingInfo/relay_info.cpp

@@ -12,7 +12,7 @@ namespace Buildings
 
 RelayInfoWidget::RelayInfoWidget(int id, QWidget* parent)
     : QWidget(parent), m_id(id), m_state(false), m_ui(new Ui::RelayInfoWidget),
-      m_logger(NGL::NGLLoggerBootstrap::getLogger())
+      m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger())
 {
     DEBUG_LOG(m_logger) << "RelayInfoWidget";
     m_ui->setupUi(this);