Sheldon Cooper | Lightrocket | Getty ImagesPinterest said Tuesday it plans to lay off less than 15% of its workforce and cut back on office space as the company embraces artificial intelligence. In a securities filing, Pinterest said it expects the cuts will be complete by the end of its third quarter in late September. Shares of Pinterest slipped about 3% premarket.The social media company said it's "reallocating resources" to AI-focused teams and prioritizing "AI-powered products and capabilit...