By Sabine Siebold and Ingrid Melander BRUSSELS (Reuters) – The European Union’s foreign ministers disagreed on Monday on whether and how to slap sanctions on Russia’s lucrative energy sector over its invasion of Ukraine, with Germany saying the bloc was too dependent on Russian oil to decide an embargo. The EU and allies have already imposed a panoply of measures against Russia, including freezing its central bank’s assets. Russia’s siege and bombardment of Mariupol port, which EU foreign policy chief Josep Borrell called “a massive war crime,” is increasing pressure for action. But targeting …