Juno Therapeutics, the Seattle biotech that's creating treatments for late-stage cancer patients, said it's completed raising $176 million in its Series A round of funding. Late last year, Juno, a joint venture between Fred Hutchinson Cancer Research Center, Memorial Sloan-Kettering Cancer Center, and Seattle Children's Research Institute — raised $120 million in initial funding and the additional $56 million included investments from Bezos Expeditions, the personal investment company of Amazon.com…