John Quinn offers the second MusicWeb International review of Thierry Fischer, the Utah Symphony, and the Mormon Tabernacle Choir’s recording of Mahler: Symphony No. 8. “I think it’s appropriate to start this this review by shining the spotlight on someone from the “back room” team. Step forward Mack Wilberg, Music Director of the Mormon Tabernacle Choir. The choral contribution to this performance is as fine as any that I can recall hearing. At a guess…