You may be scrambling to book your ticket for what sounds like a hot revival at The Pershing Square Signature Center. After all, it is packed with star power: Emily Mann directs Tennessee Williams's legendary The Night of the Iguana with Daphne Rubin-Vega, Tim Daly, Lea DeLaria, and Austin Pendleton. It seems impossible to fail! Except it does, and then you're trapped in a tedious, three-hour disappointment courtesy …