By Helen Coster and Dawn Chmielewski (Reuters) – CNN President Jeff Zucker, whom industry insiders speculated would play a larger role when the network becomes part of Discovery, resigned on Wednesday, telling staff he failed to disclose a consensual relationship with a colleague. Zucker, 56, said in a memo that his relationship came to light during the network’s investigation into the conduct of Chris Cuomo, a primetime CNN anchor who was fired in December for assisting his brother, former New York Governor Andrew Cuomo, who was accused of sexual misconduct. Andrew Cuomo has said his accusers…