By Howard Schneider, Balazs Koranyi and Leika Kihara (Reuters) -The Russian attack on Ukraine may slow global growth and raise new economic risks, but top central banks are keeping their focus trained on an inflation fight that looks set to intensify as prices soar across the board, from fuel to food. While Europe may be the most vulnerable to a broader economic shock from the war, the European Central Bank made clear on Thursday the region could not turn its back on surging inflation in the euro zone. Calling the war a “watershed moment” that could curb growth but boost inflation, the ECB agr…