JERSEY CITY — It has been a hot mess, both metaphorically and literally, for condominium residents living next to a scrapyard on the city’s Hudson River waterfront. “Excessive” noise, dust blowing over, bright lights at night and even fires and explosions are among the many complaints against the scrapyard from those residing right across the channel at the upscale Port Liberté community in Jersey City. “The noise is constant” said Lionel Medina, who moved to Port Liberté from the Bronx in 2022. “My window is right next to the channel there; I don’t enjoy working here as well as much as I shou…