By Paul Lienert (Reuters) -Electric truck maker Rivian Automotive will brief employees on Friday on potential layoffs and plans to suspend some programs as part of a broader restructuring, Chief Executive R.J. Scaringe said in an email sent to employees on Monday evening. Separately, electric-car maker Tesla Inc will permanently shut its office in San Mateo, California, and will lay off 229 employees, a filing showed on Tuesday. They were working on the company’s Autopilot driver-assistant system. Tesla Chief Executive Officer Elon Musk last month told top managers he had a “super bad feeling”…