By Vivian Sequera, Matt Spetalnick and Marianna Parraga CARACAS/WASHINGTON (Reuters) -Venezuelan President Nicolas Maduro and the country’s opposition were expected to announce a resumption of talks as Washington eases some sanctions to help smooth the way for the negotiations, according to U.S. officials and others familiar with the matter. U.S. President Joe Biden’s administration authorized U.S. oil company Chevron Corp to open talks with Maduro’s government, temporarily lifting a ban on such discussions, senior administration officials said on Tuesday. Washington has not made a final decis…