Adapts codegen templates to rtiddsgen 7.7 plain data members

qt6-after/qt6-migrated-legatus/Lts/Common/CodeGen/svc_dts_impl.cpp.grantlee

@@ -89,7 +89,9 @@ bool DtsImpl::remove{{ dt.name }}ByKey({{ dt.key.cppTypeCr }} {{ dt.key.nameFlc
     return false;
   }
   {{ namespace }}::{{ dt.name }} data;
-  data.{{ dt.key.name }}({{ dt.key.name }});
+  // rtiddsgen -stl generates plain public data members, so the key is
+  // assigned directly instead of the old setter call data.{{ dt.key.name }}(...).
+  data.{{ dt.key.name }} = {{ dt.key.name }};
   return m_dts{{ dt.name }}->remove(data, errorMsgIfSampleDoesNotExists);
 }
 {% endif %}