The Segerstrom Center for the Arts in Costa Mesa cannot be ignored. Neither, alas, can the 405.In recent days, for instance, the Vienna Philharmonic performed in Renée and Henry Segerstrom Concert Hall, the Pacific Symphony held a Philip Glass festival and Midori gave a recital of new music in the ideally intimate Samueli space.But getting to the center for an Angeleno usually means a minimum of two irritating hours in freeway crawl.