At the black-tie premiere of HBO Max’s upcoming docuseries Jay-Z in 8 on Sunday at New York’s Metropolitan Opera House, the rapper and mogul reflected on his recent run of shows at Yankee Stadium, his lengthy talks with producer and director Rick Rubin for the series and how some of what he raps about on his debut album has manifested in his life. The series, which premieres Sunday, caps an active summer for Jay-Z, who headlined the Roots Picnic festival, his first performance on top of a bill in six years. And in July, the rap superstar commemorated the 25th and 30th anniversaries of his albums, The Blueprint, and his debut, Reasonable…