While grilling Mayor Lori Lightfoot’s corporation counsel nominee on Monday, some aldermen suggested the city council needs its own attorney.Saying there’s a perception the corporation counsel is the mayor’s attorney, 42nd Ward Ald. Brendan Reilly floated the idea of having a “general-counsel type of position” to represent the council.However, acting Corporation Counsel Mark A. Flessner repeatedly emphasized during his questioning that aldermen do have someone on their side during disputes …