Variety Staff Follow Us on TwitterAs 2020 lurches to a close, Columbia Records has given Sarah Mary Cunningham and John Salcedo some well-earned reasons to end it with a toast: They have both been given vice-president stripes, of publicity and digital marketing, respectively.Since joining Columbia in July of 2014, Cunningham has worked closely with Rosalia, Leon Bridges, the soundtrack to Quentin Tarantino’s “Once Upon a Time in Hollywood,” as well as TikTok superstar rapper PPcocaine, among