Saturday Night Live will be not-quite-live one last time this spring. NBC has announced that the Lorne Michaels-produced late-night mainstay will air its 45th season finale this Saturday, May 9. SNL's last traditionally produced episode was hosted by Daniel Craig on March 7. The last time a Saturday Night Live season was shorter than 20 episodes was in 2007-2008, when the WGA Writers Strike led to a three month gap in production. But after the eventual shutdown of all TV and film production in the United States, SNL was the first scripted series to …