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/DDS/FTS/generic_fts_impl.h

@@ -65,7 +65,7 @@ private:
     // state is assigned directly instead of the old setter call.
     reply.data().replyState = replyState;
 
-    // FtReplyState_def doesn't exist anymore with rtiddsgen 7.7 - the
+    // FtReplyState doesn't exist anymore with rtiddsgen 7.7 - the
     // enum values are directly available in Core::FtReplyState.
     bool bLastTelegram = ((replyState != Core::FtReplyState::InProgress) &&
                           (replyState != Core::FtReplyState::NotStarted));