CLEVELAND — Paul Reed remembers a game against the Miami Heat last season when Kyle Lowry “got a little chirpy.” Back then, that made the 76ers big man think, “Calm down, bro.” But now, Reed is ready to welcome Lowry’s competitive edge as a new teammate. “I feel like that gets him going,” Reed said at Monday’s shootaround at Rocket Mortgage Fieldhouse ahead of the Sixers’ marquee matchup against the Cavaliers. “So I’m pretty sure he’s still going to have that.” Lowry, the North Philly native and former Villanova and Cardinal Dougherty High School star, cannot officially sign with the Sixers un…