Omar Marques | Lightrocket | Getty ImagesSouth Korea's chip heavyweights SK Hynix and Samsung Electronics skyrocketed in Seoul on Friday, tracking a sharp rally in U.S. technology stocks after blockbuster earnings from Amazon and Microsoft revived optimism around artificial intelligence spending.SK Hynix was last trading over 25% higher, putting it on course for its best day on record if gains hold. Samsung rose more than 20%. LG Innotek advanced 11.2% and Seoul Semiconductor rose 7.8%. Japanese...