Two groups of brawling migrants ganged up on a pair NYPD officers who arrived to break up a fight in the Roosevelt Hotel on May 19 — battering the cops and biting one, law enforcement sources told The Post. Both cops were taken to the hospital with minor injuries, and four migrants were arrested — three of whom were free after prior arrests, according to sources. Police responded to the storied 45th Street hotel, which has been converted to house asylum seekers, around 2:15 p.m on May 19 in response to a reported dispute between the migrants there, sources said....