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/Common/CodeGen/GeneratorGrantleeBase.cpp

@@ -13,11 +13,11 @@
 
 using namespace CodeGen;
 
-GeneratorGrantleeBase::GeneratorGrantleeBase(const char *loggerName) : m_engine(new Grantlee::Engine)
-  , m_ctx(new Grantlee::Context)
-  , m_structBuilder(nullptr)
-  .getNGLLogger(loggerName)),
-    m_logger(NGL::NGLLoggerBootstrap::getLogger())
+GeneratorGrantleeBase::GeneratorGrantleeBase(const char* loggerName)
+    : m_engine(new Grantlee::Engine)
+    , m_ctx(new Grantlee::Context)
+    , m_structBuilder(nullptr)
+    , m_logger(NGL::NGLLoggerBootstrap::getNGLRootLogger().getNGLLogger(loggerName))
 {
 }