Have mercy! John Stamos has set the record straight regarding whether he would leave his wife, Caitlin McHugh, for Lori Loughlin amid the fellow “Full House” alum’s separation from Mossimo Giannulli . The surprising incident unfolded during the episode of Ben Soffer and Josh Peck’s “Good Guys” podcast released Monday, shortly after Stamos opened up about his and Loughlin’s rumored romantic history. “A lot of people think, ‘Oh, you guys were romantic,’ or whatever,” the actor, 62, began. “You