NEW YORK, Sept 28( Reuters)-The dollar index eased from a 10-month high on Thursday but remained on track for a weekly gain, and investors stayed on guard for potential intervention in the yen as it holds near 11-month lows against the U.S. currency. The dollar has jumped on expectations that the U.S. economy will remain more resilient to higher interest rates than other economies, after the Federal Reserve last week warned that it may hike rates further and is likely to hold them higher for lon