Rakaly memory allocation failures should be better handled

[IhateTrains]

https://paradox-game-converters-group.sentry.io/issues/4862776791/events/72cd0cefa13f4fb8a7308aac79f9cb6e/?project=4505568179257344&query=is%3Aunresolved&referrer=next-event&stream_index=0

https://discord.com/channels/712465396590182461/712632868274438195/1196068607541649538

[IhateTrains]

The high memory usage by Rakaly was solved in a later Rakaly version, so currently no changes are needed on the converter part.