Costco is once again offering members discounts on electric vehicles and plug-in hybrids, this time covering 10 all-electric models and two plug-in hybrids from Cadillac, Chevrolet, GMC, Polestar, and Volvo. Running from Nov. 1, 2024 to Jan. 2, 2025, the biggest discount is $2,000 off the purchase or lease of a 2025 Polestar 3 electric SUV or 2024…