BRUSSELS—The European Union and the United States have decided to temporarily suspend measures at the heart of a steel tariff dispute that is seen as one of the major trade issues dividing the two sides. With the decision, “we are walking the talk in our efforts to reboot the trans-Atlantic relationship,” said EU trade chief Valdis Dombrovskis. It will affect anything from steel production to Kentucky Bourbon sales. On top of suspending the measures, both sides also said they are committed to talks “to address global steel and aluminum excess capacity. We are creating the space to resolve these issues before the end of the year,” said Dombrovskis. It was the second palpable step to get back to better trade relations under President Joe Biden after both sides in March decided on a four-month suspension of tariffs used in the longstanding Airbus-Boeing dispute. “As early as December 2020, the EU …