Intel Corp. Chief Executive Officer Pat Gelsinger was forced out after the board lost confidence in his plans to turn around the iconic chipmaker, adding to turmoil at one of the pioneers of the technology industry.The clash came to a head last week when Gelsinger met with the board about the company’s progress on winning back market share and narrowing the gap with Nvidia Corp., according to people familiar with the matter. He was given the option to retire or be removed, and chose to announce ...