Adapts shared tests and common code to generated rtiddsgen API

Updates test suites and Lts/Common consumers to plain member access.

qt6-after/qt6-migrated-legatus/tests/test_msg_dtc.cpp

@@ -1,11 +1,11 @@
 /**
  * @file test_msg_dtc.cpp
- * @brief Compilation test for include/Messaging/msg_dtc.h
+ * @brief Compilation test for Messaging/msg_dtc.h (generated)
  *
  * This test verifies that the migrated header compiles correctly with Qt6/C++23.
  */
 
-#include "include/Messaging/msg_dtc.h"
+#include "Messaging/msg_dtc.h"
 
 #include <gtest/gtest.h>