BAGHDAD, April 7 (Reuters) - Iraq's U.S.-installed Governing Council has discussed a proposal not to prosecute the rebel cleric Moqtada al-Sadr for murder if he agrees to halt a Shi'ite uprising, council members said on Wednesday. They told Reuters after meeting to discuss the violence sweeping Iraq that using more force against the young cleric and his followers could lead to more civilian casualties and bolster support for him. "Iraq could refrain from pursuing the arrest warrant in return for Moqtada renouncing violence," said one Shi'ite council member, who was speaking on condition of anonymity. "The situation would be akin...