“Of all the places to bring hierarchy into, music seems like the last place it should be.” (L-R: Liz Phair, Carrie Brownstein, and Corin Tucker.) Photo-Illustration: Vulture; Photos: Getty Images Despite sharing an obvious Venn diagram of fans and credos, it may come as a surprise that Sleater-Kinney and Liz Phair never shared a stage together in their three decades as musicians. No festivals, no Lilith Fairs — not even a random dive bar on a drunken night out in the ’90s. This autumn, though,