Chris Willman Senior Music Writer and Chief Music CriticTaylor Swift will release her new song, “Carolina,” a theme for the film “Where the Crawdads Sings,” tonight, she revealed on her social media this morning.The song arrives three weeks in advance of the release of “Where the Crawdads Sing,” due in theaters July 15.The coming drop was revealed in an image on the artist’s Instagram Story. She didn’t include any additional text about the tune, although it’s likely she would have more to say when the song arrives tonight.Hardcore fans already had a pretty good idea the tune would be arriving tonight.