FReplayExternalDataArray

Using an indirect array here since [FReplayExternalData](API\Runtime\Engine\FReplayExternalData) stores an [FBitReader](API\Runtime\Core\Serialization\FBitReader), and it's not safe to store an [FArchive](API\Runtime\Core\Serialization\FArchive) directly in a [TArray](API\Runtime\TraceLog\TArray).