Twenty years ago, the only statewide elected official from upstate was Lt. Gov. Mary Donohue, a Rensselaer County Republican not known to be a power player in the Pataki administration. Now, Gov. Kathy Hochul, a Buffalo Democrat, sits atop New York’s political pyramid. Former Lt. Gov. Robert Duffy has had a ringside seat to massive changes in upstate New York, from a new economic renaissance to how Hochul has transformed upstate/downstate relati…