CHARLOTTE, N.C. — There’s a controversy in Rock Hill, S.C. There’s a teetering NFL team that has had four straight losing seasons under his stewardship. There’s an all-star quarterback with all sorts of sexual misconduct allegations that the Panthers remain very interested in employing. It’s time for David Tepper, the billionaire owner of the Carolina Panthers, to break his silence. Tepper should answer questions about all of that: The financial impasse in Rock Hill, the direction of his football team and — especially if it comes to fruition — the team’s pursuit of Houston quarterback Deshaun …