May 24 (Reuters) - A look at the day ahead in Asian markets from Jamie McGeever. An expected interest rate hike in New Zealand will be the main regional focus for Asian and Pacific markets on Wednesday, as another day without agreement in Washington over the U.S. debt ceiling looks certain to sour global investor sentiment. Wall Street ended sharply lower on Tuesday and U.S. yields spiked higher - a 21-day T-bill auction drew a high yield of 6.2% and the one-month bill yield surged to historic highs of 5.888% - as an unprecedented potential U.S. default drew closer. There...