PITTSBURGH — On a night when right-hander Roansy Contreras turned in a short, uneven performance, the Pirates turned to their bullpen to pull out arguably their most satisfying comeback win of the season. Five relievers combined for five scoreless innings Friday — a bend-but-don’t-break performance that enabled the Pirates to overcome a five-run deficit and stun the Cardinals 7-5. Advertisement The Cardinals had chances to put the game out of reach. They loaded the bases in the fifth, sixth and seventh innings, but failed to score. Middle relievers Rob Zastryzny, Cody Bolton, Yohan Ramirez held firm. “That was awesome,” closer…