On April 9, the FX network will premiere Fosse/Verdon, a new miniseries chronicling the tumultuous romantic and creative relationship and marriage of director-choreographer Bob Fosse and superstar dancer-actress Gwen Verdon (encompassing such classic musicals as Damn Yankees, Chicago, and Sweet Charity).  Before that, the U.K.’s Stage Door label is celebrating the late, great Verdon with a new anthology, many of the tracks on which resulted from her partnership with Fosse. Spotlight on Gwen Verdon is set to arrive today, March 22, in the U.K. and one week later in North America on…