When Mr. Morale & the Big Steppers, Kendrick Lamar’s fifth studio album, was released on May 13, one of the album’s standout tracks quickly became “We Cry Together,” as much for its raw subject matter as its slightly irregular format. (The song sounds more like a radio play or rap battle than it does a traditional hip-hop offering.) Taylour Paige (Zola, Ma Rainey’s Black Bottom) assumes the role of Lamar’s star-crossed lover — his trigger and his muse — and…