By Simon Lewis and Tuvan Gumrukcu CHANIA, Greece (Reuters) -Middle Eastern nations need to use their influence over regional actors to ensure the Gaza conflict is contained and prevent “an endless cycle of violence,” U.S. Secretary of State Antony Blinken said on Saturday. Blinken spoke late in the day after meeting the leaders of Turkey and Greece at the start of a week-long trip aimed at calming tensions that have spiked since Israel’s war with Hamas began in October. It is in the interests of virtually all nations in the Middle East to contain the fighting, Blinken told reporters. “We want …