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/ExerciseEventManagement/web_socket_avs.h

@@ -44,7 +44,7 @@ struct AvsData
     : id(0)
     , eventTime(0)
     , endTime(-1)
-    , eventType(ProjectDataManagement::PdmEventType::Unknown)
+    , eventType(ProjectDataManagement::PdmEventType::EventType_Unknown)
     , mainStructureElementId(0)
     , timer(new QTimer)
   {