By CARY DARLING GRAPEVINE -- South Korea and Northeast Tarrant are nearly 7,000 miles, a few time zones and an ocean apart but, in one way, they are becoming as close as neighboring suburbs. In both, it's now possible to catch first-run Korean films as the AMC Grapevine Mills 30 here is scheduling the likes of Le Grand Chef 2: Kimchi Battle and Haeundae: The Deadly Tsunami alongside such American blockbusters as Avatar and Up in the Air.The result is that Grapevine and generally art-house-starved Tarrant County -- not Dallas -- is becoming the place Asian film fans in the Metroplex go to when they want to see the latest Korean export.