Go ahead and tell Kayla Harrison that Larissa Pacheco is her biggest rival, and she’ll be sure to set the record straight. That’s what she did during Wednesday’s 2022 PFL Championships press conference after announcer Sean O’Connell suggested as much. “I mean, can you call it a rivalry if you’ve never won a round?” Harrison said. “I don’t know if that’s fair. I don’t want to put that kind of pressure on Larissa. It’s not a rivalry.” Rivalry or not, Harrison (15-0) and Pacheco (18-4) are set to complete a trilogy Friday at Hulu Theatre at Madison Square Garden in…