* * 1/2 Stars | Buddy Comedy. R. 115 minutes. Take two charismatic actors. Give them characters that are, on the surface, totally incompatible. Plunk them into your basic whodunit, a mismatched team fighting fill-in-the-blank bad guys. Stir in some shoot-’em-up action, and poof: You have a buddy-cop movie. Technically, Ryan Gosling and Russell Crowe don’t play cops in “The Nice Guys.” One’s a bumbling private investigator, the other a low-life hired enforcer.