The oil tanker at the center of a lawsuit over Kurdistan’s autonomous exports appears to have unloaded at the port of Ashkelon, having abandoned its quest to deliver crude to the U.S.The United Kalavryta, carrying more than 1 million barrels of oil produced and exported by the Kurdistan Regional Government (KRG), sailed away from Texas in late January.It arrived at the Israeli port of Asheklon, where several other KRG-chartered tankers have unloaded their cargoes, and was last seen by …