Noa is sick of the meat grinder of the modern dating world. She gets much more than she bargained for in “Fresh,” a darkly comic thriller that manages to be downright charming even as it develops an appetite for human flesh. British actress Daisy Edgar-Jones (“Normal People”) is Noa, who is stuck swiping right on dating apps and is tired of ending up on dead end dates, like the one that opens the film where her companion makes off with her leftovers after making her split the check. She meets Steve (Sebastian Stan) in a grocery store and the two hit it off over a couple of sampled cotton candy…