Don Lemon is headed to the day shift. The CNN host will leave the 10 p.m. ET hour later this year and help launch a new morning show along with co-hosts Poppy Harlow and Kaitlan Collins, the network announced Thursday. “The last eight years have been an incredible ride. I’ve had the opportunity to work with one of the best show teams in the business, but it’s time to shake things up. I am so appreciative of the ‘Don Lemon Tonight’ team, my wonderful, loyal viewers and everyone who has believed in me,” the 56-year-old anchor said in a statement. “It’s going to be a thrill to take on this challe…