By Christoph Steitz and Andreas Rinke FRANKFURT (Reuters) – Germany on Sunday announced its latest steps to boost gas storage levels to prepare for the next winter season, when it fears Russia, which has cut deliveries in recent days, could reduce or even completely halt supplies. Following Russia’s invasion of Ukraine, Germany, which relies on Moscow for most of its gas, is seeking to fill its gas storage facilities and to phase out Russian energy imports. Germany’s Economy Ministry said the new measures would include increased reliance on coal-fired power plants as well as an auction system …