So much for the battle rounds just featuring the contestants on The Voice . Sources tell In Touch the gloves are off between Kelly Clarkson and Gwen Stefani. “Kelly is out, and Gwen is back in, and that burns Kelly,” a source says of Season 22’s coach lineup, which will also include Camila Cabello, 25, who’s replacing Ariana Grande, 28. “Kelly famously feuded with Blake [Shelton, 45,] on the show, so the fact that his wife, Gwen, is taking Kelly’s seat...well, she’s not happy about it. But Gwen has made it no secret that she’s wanted back on the show, so she’s thrilled.” So is Blake, who never wanted her to leave in the first place. In 2019, when there were rumblings the “Hollaback Girl,” 52, was leaving the show,…