OpenAI’s Chief Executive Officer Sam Altman was cleared of any wrongdoing that would have mandated being fired from the company late last year, according to a report based on a monthslong investigation into the events leading up to his brief ouster.WilmerHale, the law firm that conducted the inquiry, found that the board’s decision to fire Altman was a “consequence of a breakdown in the relationship and loss of trust between the prior Board and Mr. Altman,” the artificial intelligence startup sa...