Photo: Michael Kovac/AFI/Getty Images Earlier this week, after years of financial struggles, BuzzFeed got a lifeline. Byron Allen, a media entrepreneur known for making sometimes unsolicited bids on massive companies such as Paramount Global and Tegna, has agreed to pay $120 million for a 52 percent stake in the digital-media company. BuzzFeed founder Jonah Peretti will end his two-decade run as the company’s chief executive and become president of BuzzFeed AI — a role that he’s essentially