Tesla TSLA.O tumbled 6.6% and weighed heavily on the S&P 500 and Nasdaq. By Noel Randewich and Devik Jain Aug 5 (Reuters) - The S&P 500 ended lower on Friday, weighed down by Tesla and other technology-related stocks after a solid jobs report torpedoed recent optimism that the Federal Reserve might let up its aggressive campaign to reign in decades-high inflation. Data showed U.S. employers hired far more workers than expected in July, the 19th straight month of payrolls expansion, with the unemployment rate falling to a pre-pandemic low of 3.5%.