Bob GarverSpecial to the Valley NewsWith “Barbarian,” writer/director Zach Cregger of “The Whitest Kids U Know” becomes the latest performer primarily known for comedy to take a stab at the horror genre. The gold standard is of course Jordan Peele, whose “Get Out” in 2017 was an out-of-nowhere success both at the box office and awards podiums. Then there’s John Krasinski, who led “A Quiet Place” to critical and commercial success in 2018, and perhaps even more impressively, “A Quiet Place Part II” to becoming arguably the first post-pandemic blockbuster last year. “Barbarian” isn’t a creative game-changer or a box office powerhouse, but it gets Cregger’s foot in the door for what might be a rewarding career in horror.The film – at first – follo