Kylie Minogue releases her aptly titled “Disco” album on Friday, a look at how she, along with Dua Lipa, Jessie Ware, Róisín Murphy and, of course, Lady Gaga have twirled back to the dance floor — even when the clubs were closed.After trading her dancing pumps for cowboy boots on “Golden,” her 2018 country detour, the dancing queen from Down Under takes it back to her rug-cutting roots.