There isn't any horizontal concrete wall leveler that I'm aware of but that doesn't mean they don't exist. (How you'd do it will be of interest to me.)
Usually, when basements are 'finished', moisture barrier, studs/strips, and a finished wall are put up. THAT'S the wall that's made straight; not the poured wall. Moisture conditions need to be looked into first before getting too far.
Maybe someone else has more to add. My best to ya and hope this helps.