BERLIN, June 8 (Reuters) - Reality star Kim Kardashian's arrival at a gathering of the globe's top deal brokers in Berlin failed to dispel their dark mood as the rising cost of money puts the brakes on the private equity industry.Flanked by bodyguards, Kardashian drew a crowd of hundreds of executives at the SuperReturn industry event, saying she wanted to learn the secrets of investing having set up her own fund last year.Talking about her ambitions, Kardashian, whose empire spans skincare and underwear, sought what she called the "magic sauce"...