By Steve Holland, Aziz El Yaakoubi and Maha El Dahan JEDDAH, Saudi Arabia (Reuters) – U.S. President Joe Biden said on Friday he told Saudi Arabia’s Crown Prince Mohammed bin Salman he held him responsible for the murder of Washington Post journalist Jamal Khashoggi as they held talks meant to reset relations with the key Arab ally. Biden, speaking after meetings with Saudi Arabia’s top leaders, said the crown prince, known as MbS, denied involvement and said he had held those responsible to account. Biden shared a fist bump with MbS and shook hands with King Salman after arriving in Saudi Ara…