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_lts_coord_vector.cpp

@@ -1,13 +1,27 @@
 #include <gtest/gtest.h>
 
-// Stub test for lts_coord_vector.cpp migration validation
+// Compile-level regression test for the LtsCoordinate migration.
+//
+// lts_coord_vector.h includes the export header generated by
+// NGL_ADD_LIBRARY2 for target LtsCoordinate as
+// <LtsCoordinate/ltscoordinate_export.h> (same form as the qt5 legacy).
+// The build-tree location (build4/Lts/Common/LtsCoordinate) is reachable
+// for consumers via the PUBLIC binary-dir include of LtsCoordinate and of
+// the sibling NGL_ADD_LIBRARY2 targets under Lts/Common. A bare quoted
+// #include "ltscoordinate_export.h" only resolved inside the LtsCoordinate
+// target itself and broke every consumer (svcIsmClient via
+// ism_dtc_impl_custom_p.h), so this TU must keep including the header the
+// same way consumers do.
+#include <LtsCoordinate/lts_coord_vector.h>
 
-namespace Lts
-{
-namespace Common
-{
-} // namespace Common
-} // namespace Lts
+#ifndef LTSCOORDINATE_EXPORT
+#error "ltscoordinate_export.h was not resolved; lts_coord_vector.h include regressed"
+#endif
+
+#include <type_traits>
+
+static_assert(std::is_class<LtsCoordTrans::LtsCoordVector>::value,
+              "LtsCoordVector must be declared by lts_coord_vector.h");
 
 TEST(lts_coord_vectorMigrationTest, CompilationStub)
 {