By Jonathan Landay KHARKIV, Ukraine (Reuters) -Ukraine said on Tuesday its forces had recaptured villages from Russian troops north and northeast of Kharkiv, pressing a counter-offensive that could signal a shift in the war’s momentum and jeopardise Russia’s main advance. Tetiana Apatchenko, press officer for the 92nd Separate Mechanized Brigade, the main Ukrainian force in the area, confirmed that Ukrainian troops had recaptured the settlements of Cherkaski Tyshky, Ruski Tyshki, Borshchova and Slobozhanske, in a pocket north of Kharkiv in recent days. Yuriy Saks, an adviser to Defense Ministe…