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/object_frequency_planning_status.h

@@ -21,7 +21,7 @@ public:
                            DatabaseInterface *db);
   ~ObjectFrequencyPlanningStatus();
 
-  int getId() const { return m_data.id(); }
+  int getId() const { return m_data.id; }
   FrequencyPlanningStatus getData() const { return m_data; }
 
 
@@ -35,7 +35,7 @@ public:
   static Database::AvmFrequencyPlanningStatus toDbData(const FrequencyPlanningStatus &ddsData);  // dds -> db
   static FrequencyPlanningStatus toDdsData(const Database::AvmFrequencyPlanningStatus &dbData);   // db -> dds
 
-  bool isValid() const { return (m_data.client() > 0); }
+  bool isValid() const { return (m_data.client > 0); }
 
 protected:
   void onPublishData();