The bass is turned up and the lights are back on at 140 Stewart Avenue in Williamsburg. Avant Gardner, formerly home to the iconic Brooklyn Mirage, has been taken over by global nightlife brand Pacha Group. And if there’s one thing Pacha has proven, it’s that New York’s house music scene isn’t merely revived — it just might be louder than ever before. Last year, the sprawling 80,000-square-foot venue came crumbling to the ground after an ambitious $30 million renovation plan was halted over