SYDNEY, Feb 23 : Share markets were hesitant and the dollar slid in Asia on Monday as investors waited for some much-needed clarity on U.S. tariffs, while confidence in the entire AI trade was set to be tested by results from tech-diva Nvidia this week.  Oil prices eased ahead of another round of talks between the United States and Iran due in Geneva on Thursday, with the risk of U.S. military strikes lingering if a deal is not done. Confusion loomed large after the U.S. Supreme Court struck