“Unholy” leads the midweek U.K. chart and is heading for a fourth consecutive week at No. 1. Sam Smith and Kim Petras are on the verge of completing an “Unholy” (EMI) month in the U.K. The hit collaboration leads the midweek U.K. chart and is heading for a fourth consecutive week at No. 1. “Unholy” heads an unchanged top 4, …