most recently “Ghostbusters: Afterlife.” Granted, a Steven Spielberg musical is no sci-fi epic or Bond film, but it’s the kind of adult-skewing film that often performs well in the December corridor.The three-time Oscar-winning filmmaker has long hoped to make a musical, and he brings his masterful eye for shot composition and stage direction to vibrant life with “West Side Story,” uniting with longtime cinematographer Janusz Kaminski to offer their most colorful live-action film since 2002’s