SAN FRANCISCO—Jordan Poole spent a quarantine period in Boston doing jumping jacks, burpees, mountain climbers and anything else he could to keep his conditioning up while stuck in a hotel room. Poole scored 32 points in his new reserve role, Andrew Wiggins added 22 points and a key driving dunk with 4:34 remaining on a quiet night for Stephen Curry, and the Golden State Warriors held off the undermanned Miami Heat 115–108 on Monday night. “It was huge, we needed all of his 32 points, and the early foul trouble with Steph it changed our rotations,” coach Steve Kerr said. “What a luxury to be able to come off the bench with a guy who’s just started the first 35 games or whatever it was. Jordan has turned into just a critical player for us and he will remain to be critical with all the guys coming back coming off …