“Snatched” is the highest of high-concept comedies. Goldie Hawn and Amy Schumer star as a polar-opposite mother and daughter who get kidnapped while reluctantly vacationing together in Ecuador. It’s a mismatched-buddy comedy. It’s a fish-out-of-water comedy. It’s a raucous girl-power comedy. But it’s not much more than a concept. My RogerEbert.com review.