k.d. lang goes from “Constant Craving” to constant clubbing.The new LP, out Friday, features twirling takes on torchy tunes such as “Miss Chatelaine,” “If I Were You” and “Sexuality.” Here, the Grammy-winning chanteuse, 59, reveals why “Constant Craving” didn’t make the remix cut, how she feels about today’s LGBTQ artists and what it was like getting that famous shave from Cindy Crawford.Why do you think that your music ended up working so well for remixes?I think culturally it had relevance being sort of the person of the moment [who was] out and representing a part of the gay culture and fighting for equality.