Jessica Kiang In the pantheon of notoriously unavailable films, Jerry Lewis’ “The Day the Clown Cried” occupies a special plinth: Its outline — a circus clown is imprisoned in a Nazi concentration camp where he cheers up Jewish children before being forced to lead them to their doom — makes it one of the few movies to have been suppressed purely on the grounds of “yikes.” It is perhaps unfair to compare it with “Freaks Out,” the second film from Italian director Gabriele Mainetti (“They Call Me