Last year Ford Motor suspended production of an electric pickup truck, shut down a battery factory in Kentucky and booked a $20 billion loss to account for its diminished plans. Then, last month, the senior executive who oversaw development of this new technology left the company. But Ford executives insist that those setbacks do not mean that the company has given up on electric vehicles. As evidence, they point to a former warehouse here in Long Beach, Calif. There, a team lead by Alan Clarke, a Tesla veteran, is building…