“Dinner for Schmucks” is out today, bringing home Steve Carell’s third movie of the year, after “Date Night” and “Despicable Me.” A few weeks ago, Carell sat down — and I use the term loosely — with MTV’s Josh Horowitz for an informal chat. A very informal chat. Remember Josh’s encounter with John C. Reilly back in June? This is more awkward, more disturbing. Hit play and prepare to be horrified.