EL ALTO, Bolivia, July 4 (Reuters) - At a "Witches Market" in the Bolivian city of El Alto, dried llama fetuses said to bring good fortune hang outside tin shack stalls while healers read the future in coca leaves and call on ancient spirits to cure ills. When Pope Francis visits Bolivia next week, he will discover a nation that cherishes animal sacrifices and pagan worship and where relations between indigenous communities and the Roman Catholic Church have been strained.