Tesla stock was poised to skid to new 30-month lows Friday after the company steepened its discounts on Model 3 and Model Y autos sold in China. The move sent U.S.-traded shares of China EV competitors sharply lower, alongside Tesla, in premarket trade. X The China price cuts, the company's second discount in the country in fewer than 10 weeks, focused growing attention on a weakening of consumer demand.; Consumers, facing high inflation, rising interest rates, financing costs and an increasingly uncertain economic outlook, have grown more cautious about big ticket purchases. In October, after years of price increases, Tesla…