Until recently, the Japanese electronics and entertainment giant Sony Group (SONY)had taken a different approach to streaming. It acted as an “arms dealer,” supplying its film and television rights to streaming companies like Netflix (NFLX). But now, Sony is making a multibillion-dollar push into producing more original content for its own use. This is part of a “creation shift” the company hopes will win it a greater share of the $3 trillion global entertainment industry. The company has spent $10 billion over the past six years to build a vast portfolio of games, films, and music – the three…