Goldman Sachs has hired Robert Sobelman — a hotshot federal prosecutor who worked on the corruption case against outgoing mayor Eric Adams that was controversially scrapped by the Trump administration — as its new head of investigations, The Post has learned.Sources close to Sobelman, an alum of Colgate University and Brooklyn Law School, said he is to join the David Solomon-led lender “imminently.”“Robert is leaving and going to run investigations at Goldman,” said one senior source briefed on the matter. ...