It’s all vibes until you’re 45 minutes deep in a coffee line, wearing little more than a bandeau top and short-shorts. Scantily-clad Coachella festivalgoers found themselves in a different kind of endurance test this weekend— stuck in marathon lines for Starbucks drinks under the brutal desert sun. Instead of dancing under palm trees, some attendees spent peak festival hours baking in 80F heat, inching forward for iced lattes and refreshers — the closest thing to survival fuel. Videos circulating on social media show massive crowds snaking through the festival grounds, with attendees in barely-there outfits— think sheer dresses, shorts and…