MOSCOW — Russian officials had disdainful words Saturday for a U.S. indictment that charged 13 Russians with interfering in the 2016 presidential election. Children’s stories, the plot of a preposterous Hollywood movie and “just blabber” were a few of the glib analogies they pressed into service. The language, while dismissive, suggested that Russia feels cornered by the unrelenting allegations that the Kremlin had a role in President Donald Trump’s election.