As workers for the NFL dug holes Monday in the meticulously groomed turf of a youth soccer complex next to Levi’s Stadium, the Santa Clara Youth Soccer League added the mighty NFL to a lawsuitfighting the league’s plan to use the fields for media broadcasts of Super Bowl 50. Santa Clara County Superior Court Judge Joseph H. Huber last week rejected the soccer league’s request for atemporary restraining order but asked the NFL not to make “drastic changes” to the soccer fields until the issue could be heard in court on Wednesday.