Comedian Artie Lange says he has completed New Jersey’s mandated drug court, a recovery program for addicts who commit crimes. “Happy to announce that I’ve completed the NJ drug court program,”Lange, 54, of Hoboken, tweeted Thursday. “Thx to my family and friends and fans for all your support.” The former Howard Stern Show sidekick, who grew up in Union, was arrested on cocaine and heroin possession charges in Hoboken in March 2017 and pleaded guilty later that year. He entered a drug treatment program, but was busted again in 2019 in Essex County for failing to comply with the program. Lange …