By Andrew Gould Tensions mounted on the Miami Heat sideline in the midst of Wednesday’s 118-104 loss to the Golden State Warriors. Despite playing without Stephen Curry, Klay Thompson, and Draymond Green, the short-handed Warriors started the third quarter with a 19-0 run. During a timeout, an agitated Jimmy Butler and Udonis Haslem exchanged words, and head coach Erik Spoelstra also showed his frustration. After the game, per Bally Sports Sun, Spoelstra tried to brush off the testy encounter as emotions getting the best of a passionate team. “We have a very competitive, gnarly group and we we…