WASHINGTON (AP) — Performers this sort of as Gladys Knight or the Irish band U2 commonly would be headlining a concert for countless numbers, but at Sunday’s Kennedy Heart Honors the tables have been turned as they and other artists were feted for their life span of inventive contributions. Actor, director, producer and human rights activist George Clooney, groundbreaking composer and conductor Tania León, and modern day Christian singer Amy Grant will be part of Knight and the complete crew of U2 in getting honored by the John F. Kennedy Heart for the Accomplishing Arts. The group honors a pick out team of persons each individual year for their inventive…