By Trish Rooney Dolly Parton, universally beloved country singer, EGOT nominee, literacy promoter, vaccine creator (via donation), and founder of Dollywood, is adding another notch to her belt; she’s been tapped to star in…a musical about the Mexican Pizza from Taco Bell. No, we’re not kidding. Like most ridiculous things, this all started on Tik Tok, with an assist from pop star Doja Cat. In a video, the songstress mourned the loss of the Mexican Pizza, a Taco Bell menu item that sounds like it was created by either a stoner or a four-year-old, and which was discontinued from the store in 202…