NEW YORK — How did Frank Vogel get his start in coaching? “That’s a long story you’re getting into there,” I was warned as I asked Vogel that question at the Pacers’ shootaround on Tuesday morning at MSG. Indeed, it is. Vogel, who finished a distant fifth in voting for Coach of the Year honors, isn’t a former NBA player. He is, however, a former Division III, pre-med varsity point guard with a 2.6 GPA (“That was not going to get me into med