Rick Wilmer spends most of his work days at the office. But every so often, the chief executive officer of ChargePoint Holdings Inc. will make his way to the company’s laboratory in San Jose, California, where he dons safety glasses and wields an array of saws and shears against EV chargers. The goal: to approximate the rash of vandalism sweeping the 65,000 U.S. cords under ChargePoint’s care.