This weekend, the Sacramento Master Singers will perform excerpts from Duke Ellington's "Sacred Concerts." It marks several important homecomings. It will be a homecoming for the Grammy-winning piece, which was played by Ellington and his legendary orchestra in 1965 at Sacramento's Westminster Presbyterian Church. Friday through Sunday, it will be played at the Crest Theater, less than half a mile from the church. It will also be a homecoming for Ardie Bryant, the "Ambassador of Tap," who spent his early years in Sacramento and graduated from Sacramento High School. Saturday, the legendary bebop jazz tap dancer, who has danced with everyone from Ellington to Count Basie, Charlie Parker a