The divas rule this week’s releases with three distinct CDs providing rarely performed music as Diana Damrau and Sonia Prina rediscover the music of Gluck and Meyerbeer. Meyerbeer rediscovered  In Diana Damrau’s latest album, “Grand Opera,” the German soprano puts a spotlight on the often overlooked music of  Meyerbeer. Not only does she perform arias from the composer’s more famous opera {…}