Nike has turned Kyrie Irving’s suspension into a separation. And a forgone conclusion into a reality. A month after Irving had his relationship with Nike suspended, now the athletic apparel giant officially parted ways with him. The news was first reported Monday by The Athletic, and confirmed by The Post through a source close to Irving. The 30-year-old Nets star has one of the NBA’s most popular signature shoes, but is now going to be not just a free agent this summer when his deal with Brooklyn expires, but also a shoe free agent as well in the sneaker wars....