Barrie Kosky’s vividly abstract production of Saul for Glyndebourne embraces every emotional detail of this dramatic oratorio, from its exhilarating choruses to its raw, intimate family scenes. Kosky adds voices beyond Handel’s music: we hear laughs, shouts, cries, sobs, sighs, gasps, even spoken words around and between the score, fleshing out each moment with human detail.…