Dolly Parton left bed rest to record her final song in June, two months before her death, U2’s Bono revealed. The late country music icon, who died on Aug. 25 at age 80, gave her final vocal performance for the track “Torn,” off the band’s upcoming “Carnaval De Luz” album. The record will come out on Nov. 19 — and Bono, 66, told Rolling Stone on Thursday that he “can’t even listen” to Parton’s part since her passing. “When she got ill, she got out of her bed to sing this song,” the U2 frontman shared with the outlet. “And you can hear that.” “She sang her heart out,” he gushed, “and I cannot believe that’s an 80-year-old woman.” Bono noted…