AUGUSTA, Ga. — When it comes time, when the world is watching and his golf matters most, Harold Varner will decide what kind of symbol he’ll be. You don’t get to make that call. Friday was one such time. He came off windswept Augusta National, a place that has been at the molten center of so many conversations about golf and race, having shot a very trim and useful 71. That put a Black man not named Tiger Woods within reach of the Masters lead. And, so, the question comes: As he walks among the leaders here, does he think about the stage he’s on and what he might represent? “I represent Harold…