The legal landscape for state-regulated marijuana markets has changed dramatically since the U.S. Supreme Court last weighed in on the issue in 2005. A group of Massachusetts weed businesses have filed a lawsuit seeking to bar the government from enforcing federal drug laws against state-regulated cannabis companies. They’re represented by the powerhouse law firm of David Boies, best known for high-profile litigation seeking the breakup of Microsoft, representing former Vice President Al Gore in the…