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/ParticipantManagement/PartyHandling/party_handler.cpp

@@ -305,7 +305,7 @@ void PartyHandling::PartyHandler::onSyncPartiesRequest(const rti::core::SampleId
         req.fadingColor(partyEx0.fadingColor);
         req.name(partyEx0.name.toStdString());
         req.role(partyEx0.roleId);
-        req.hlaForceIdentifier(static_cast<HlaForceIdentifierEnum::inner_enum>(partyEx0.hlaForceIdentifier));
+        req.hlaForceIdentifier(static_cast<HlaForceIdentifierEnum>(partyEx0.hlaForceIdentifier));
 
         // this remains as it is
         req.isUsedBy(partyEx->isUsedBy());