Black workers at Tesla’s Fremont factory were paid less than white workers, denied advancements, and faced daily racist abuse, including a noose drawn in a bathroom next to a reference to lynching and a racial slur, a lawsuit by California’s civil-rights regulator claims. “As early as 2012, Black and/or African American Tesla workers have complained that Tesla production leads, supervisors, and managers constantly use the n-word and other racial slurs to refer to Black workers,” the suit filed Wednesday in Alameda County Superior Court alleged. “They have complained that swastikas, ‘KKK,’ the …