By Sarah Tetteh Lana Del Rey has let rip at her former tour manager after her headline set at Coachella. The US singer and songwriter, real name Elizabeth Woolridge Grant, opened up about her former co-worker during an Instagram post. Lana was thanking all the people who helped pull the show together, including Billie Eilish, when she apparently through shade at her ex tour manager. Her rant came after thanking a bunch of people. She thanked: “Emily for stepping up as tour manager when Pete quit for no reason after 15 years because he was butt hurt that I got 10 comped bikes for free from Wall…