Comedian Jerrod Carmichael is officially a triple threat. The writer and performer can now add director to his bio, making his debut with the pitch-black suicide comedy “On the Count of Three,” in which he co-stars opposite Christopher Abbott. The film, which Carmichael directed from a script written by “The Carmichael Show” writer Ari Katcher, who co-wrote with Ryan Welch, premiered at this year’s Sundance Film Festival. It arrives in theaters on the heels of his revealing and intimate comedy special, “Rothaniel,” which recently bowed on HBO Max, as well as a stint hosting one of the weirder …