Migrates residual Lts sources to generated rtiddsgen API

Adds NmeaManagement tests, fixes codegen includes and Qt6 SerialPort CMake target.

qt6-after/qt6-migrated-legatus/Lts/Services/AudioVideoManagement/exercise_handler.cpp

@@ -189,7 +189,7 @@ void ExerciseHandler::onLastSeenTimerTimeout()
   // and remove all device_config entries except the record/replay session
   // when the cleanup is finished (signal from A/V) we remove also the last two sessions and delete our self
   auto ex = exmDtc()->exercise(m_exContext.id());
-  if (ex.id() == m_exContext.id())
+  if (ex.id == m_exContext.id())
   {
     // found -> update last seen timestamp
     m_lastSeen.context = m_exContext.toString();
@@ -263,7 +263,7 @@ void ExerciseHandler::onContextFilesDeleted(const ExerciseContext &context)
 
 AVControl::OperatingMode ExerciseHandler::avModeFromExerciseState(ExerciseManagement::ExerciseState state)
 {
-  switch (state.underlying())
+  switch (state)
   {
   case ExerciseManagement::ExerciseState::Unknown:
   case ExerciseManagement::ExerciseState::Created: