By Mark Trevelyan LONDON (Reuters) – A flurry of military activity in Belarus this week has caught the attention of Ukraine and the West as a potential sign that President Alexander Lukashenko may commit his army in support of Russia’s flailing war effort in Ukraine. Lukashenko has ordered troops to deploy with Russian forces near the Ukraine border, and his defence ministry says “combat readiness” drills are under way. On Tuesday, the interior ministry held exercises to eliminate “sabotage groups” near Yelsk, only 20 km (12 miles) from the border with Ukraine. Ukrainian President Volodymyr Ze…