Before dropping 120 pounds, Stephanie Bailey cycled through “every diet on the planet and every workout” imaginable to try to make the scale budge. She even resorted to VHS tapes of Richard Simmons’ “Sweatin’ to the Oldies” and Billy Blanks’ Tae Bo — plenty of punches and spandex, but little payoff. “It was a lot of ups and downs, and it really wasn’t until, like, three or four years ago that I felt a lifestyle shift,” Bailey, 38, told The Post. “I naturally knew how to eat and enjoyed working