By Philip Pullella and Kevin Dougherty SAINTE-ANNE-DE-BEAUPRE, Quebec (Reuters) -Pope Francis on Thursday said the Catholic Church felt “the burden of failure” for its role in running government-backed residential schools that tried to wipe out indigenous cultures and became places of abuse. On the penultimate day of his week-long apology tour of Canada, Francis presided at a Mass at the Basilica of Sainte-Anne-de-Beaupre outside Quebec City and spoke of “the burning questions that this pilgrim Church in Canada is asking.” “In confronting the scandal of evil and the Body of Christ wounded in t…