Russia said Friday it had finished pulling back its troops from Kherson in southern Ukraine, abandoning the only regional capital its forces had captured in nearly nine months of fighting. The Kremlin meanwhile insisted that the city was still part of Russia and said it did not regret annexing the urban hub and the Kherson region at a lavish ceremony in late September. The announcement came hours after Russian strikes battered a residential building in Mykolaiv, killing at least seven people in the city near Kherson that Moscow’s forces have been battering for months. “Today at 5 o’clock in th…