Noah Laba didn’t exactly expect to spend his entire first full professional season in the NHL. Capping his collegiate career before an 11-game taste of the AHL with the Wolf Pack last year, Laba reported to his first Rangers training camp this past fall and forced his way into the Opening Night lineup. He put on a master class on how to do so, leading the Blueshirts with six preseason points. What really mattered, however, was Laba’s ability to maintain his third-line center role and earn the Rangers coaching staff’s trust to expand it . “Did I necessarily expect that? No,” Laba said of being a full-time NHLer on breakup day. “But if you were to have told me it would happen, I’d say that’s what I was working for. That’s what I believed in myself for … it’s not easy, especially coming from college. I think I only played 29 college games last year. So coming and kind of playing more than double, you learn a lot. Noah Laba skates with the puck during the Rangers’ April 11 game.…