Shares of Tesla TSLA.O led declines among growth stocks, including Apple Inc AAPL.O, Netflix Inc NFLX.O and Amazon.com Inc AMZN.O which fell between 0.5% and 1.5% in premarket trading. By Amruta Khandekar June 29 (Reuters) - U.S. stock index futures dipped on Wednesday after several Federal Reserve policymakers made the case for faster interest rate hikes to bring down high inflation. Data on Tuesday showed U.S. consumer confidence dropped to a 16-month low in June on worries about high inflation and growing risks of a recession.