NEW YORK — Julius Randle sized up Raptors forward Scottie Barnes, throwing a flurry of jab steps and shoulder checks at Toronto’s forward before uncorking just one more jab step toward the foul line. Barnes bit, Randle drove baseline then elevated with two hands and threw down over Raptors big man Precious Achiuwa. Randle turned the rim into a pull-up bar and lifted his body up high enough to slap the backboard after the play. Then he shrugged off the technical foul before pleading with the crowd. “Come on!” he repeated, urging the crowd to get louder. The Knicks needed a victory on Monday nig…