Dicks: The Musical opens with a title card joking that the film bravely breaks new ground by casting gay actors as straight characters.  In reality, it breaks ground by being the world’s first feature-length movie Rusical, hitting the exact same braying, sarcastic tone as the musical theatre challenges of RuPaul’s Drag Race.  In this case, we’re watching a Rusical parody of The Parent Trap (a…