By Sachin Ravikumar LONDON (Reuters) – London’s Battersea Power Station reopens next week as a glitzy hub of offices, flats, restaurants and shops after decades of failed attempts to reinvigorate one of the capital’s most iconic buildings, often described as the “Everest of real estate”. The 1930s power station once supplied a fifth of London’s electricity, including to Buckingham Palace and parliament, but is better known for featuring alongside a floating inflatable pig on the cover of Pink Floyd’s 1977 album “Animals”. The colossal brick building earned its reputation as one of London real …