BERLIN — Ukraine has closed its embassy in Cuba and censured the government in Havana over allegations that the Caribbean dictatorship is complicit in sending troops to fight in Russia’s war against Ukraine. The move comes just weeks after Russia and Cuba signed a military cooperation agreement and the U.S. released intelligence suggesting as many as 5,000 Cubans may be on the frontlines. Ukrainian Foreign Minister Andrii Sybiha accused Cuba of being “complicit” in Russia’s war of aggression by