Chicago police officers will no longer be allowed to chase people on foot simply because they run away or give chase over minor offenses, the department said Tuesday, more than a year after two foot pursuits ended with officers fatally shooting a 13-year-old boy and 22-year-old man.The new policy adheres closely to a draft policy put in place after those shootings and gives the department something it has never had: permanent rules about when officers can and can’t engage in an activity that can endanger themselves, those …