Jeremy Allen White is training with a top vocal team and watching endless YouTube videos to prepare for his performance as Bruce Springsteen. ‘The Bear’ actor is playing The Boss in new biopic ‘Deliver Me From Nowhere’ – about the making of the rock icon’s 1982 album ‘Nebraska’ – and he’s working hard to get his singing voice in shape so he can tackle some of the musician’s songs in the new film. Jeremy, 33, told GQ magazine: “I’m really lucky that there’s sort of a team of folks now in place to help young actors portray rock stars. I’ve got a really talented group of people helping me train v…