By Greg Bensinger and David Shepardson SAN FRANCISCO/WASHINGTON (Reuters) -GM’s Cruise self-driving car unit on Thursday revealed probes by the U.S. Justice Department and Securities and Exchange Commission stemming from an October accident in which one of its robotaxis struck a pedestrian and dragged her 20 feet. Cruise reported the government investigations in a blog post in which the company also vowed to reform its culture stemming from a “failure of leadership” around the incident. One expert said the actions that Cruise took immediately after the accident were “egregious.” The new probes…