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/CodificationManagement/Test/maindialog.cpp

@@ -12,7 +12,7 @@ MainDialog::MainDialog(QWidget *parent) : QDialog(parent)
   , m_ui(new Ui::MainDialog)
   , m_numCodeModel(new NumeralCodeModel(parent))
   .getNGLLogger("COD_Test_NumeralCodeTableMainDialog")),
-    m_logger(NGL::NGLLoggerBootstrap::getLogger())
+    m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger())
 {
     m_ui->setupUi(this);
 }