By Pavel Polityuk and Aleksandar Vasovic LVIV/KYIV, Ukraine (Reuters) -Russian President Vladimir Putin said Western sanctions were akin to war as his forces pressed their assault on Ukraine on Saturday for a 10th day and the IMF warned that the conflict would have a “severe impact” on the global economy. Moscow and Kyiv traded blame over the failure of plans to impose a brief ceasefire and enable civilians to evacuate two cities besieged by Russian forces. Russia’s invasion has already driven nearly 1.5 million refugees westwards into the European Union. Ukraine’s President Volodymyr Zelenski…