By Parisa Hafezi DUBAI (Reuters) – Emboldened by an oil price surge since Russia invaded Ukraine, Iran’s clerical rulers are in no rush to revive a 2015 nuclear pact with world powers to ease sanctions on its energy-reliant economy, three officials familiar with Tehran’s thinking said. Last year, the Islamic Republic engaged in indirect talks with the United States as a route to cancelling U.S. sanctions that have gutted revenues and dramatically worsened economic hardships for ordinary people, stirring discontent. But the talks have been on hold since March, chiefly over Iran’s insistence on …