By Foo Yun Chee and Jan Strupczewski BRUSSELS (Reuters) -Apple was fined 500 million euros ($570 million) on Wednesday and Meta 200 million euros, as European Union antitrust regulators handed out the first sanctions under landmark legislation aimed at curbing the power of Big Tech. The EU fines could stoke tensions with U.S President Donald Trump who has threatened to levy tariffs against countries that penalise U.S. companies. The sanctions follow a year-long investigation by the European Com...