After Luciano, the main character in Matteo Garrone’s new film “Reality” (out March 15th) gets the call from a T.V. studio telling him he’s made the first cut in a casting call for the reality T.V. show “Grande Fratello” (“Big Brother”), he gradually slides into full-blown paranoid megalomania. Watching him wait anxiously for the next round of callbacks is comical at first, until his affliction threatens to take him and his family down. It’s