HALF MOON BAY, Calif. — What’s the next big thing at Cypress Semiconductor Corp.? Try energy and energy harvesting. After spinning out its sizzling solar-cell unit, Cypress (San Jose, Calif.) is looking for a new engine for growth. The solar unit, SunPower Corp., represented about 63 percent of its total sales in the third quarter alone. In its fourth fiscal quarter, Cypress will no longer consolidate or report SunPower’s financial results in its own bottom line.