Meryl Streep wearing Richard Quinn at “A Night With Runway” in London. Gareth Cattermole/Getty Images Move at a glacial pace? Micaela Erlanger would never. Over the past month, the celebrity stylist prepped no fewer than 25 different designer outfits for longtime client Meryl Streep’s “The Devil Wears Prada 2” press tour , which took the three-time Oscar winner around the globe. Coincidentally, when Streep first graced the big screen as icy fashion editor Miranda Priestly in 2006, Erlanger was an intern at Condé Nast — the magazine publisher behind Vogue, on which the film’s fictional glossy Runway is based. “The original film was a total cultural touchstone that shaped my early career,” the wardrobe whiz told Page Six Style. “After 11 years of working with Meryl, stepping into this legacy to evolve her iconic look for the sequel feels like the ultimate ‘pinch-me’ creative milestone.” Wearing Dolce & Gabbana with Anne Hathaway (in Schiaparelli) in Mexico City.…