KHERSON, Russian-controlled Ukraine (Reuters) – The streets and boulevards of the Russian-held port of Kherson in southern Ukraine are virtually empty. Many shops and businesses have been shuttered and, at a jetty on the banks of the Dnipro River, a handful of people board a ferry to leave. As Ukrainian forces advance to the north and east of the strategic city, Russian-installed officials there have evacuated tens of thousands of civilians in recent weeks. Only a few remain, and some expressed frustration at not knowing what lay ahead. Compounding the uncertainty are claims and counter-claims…