By Nellie Peyton and Olivia Kumwenda-Mtambo JOHANNESBURG (Reuters) – South Africans awaited confirmation on Sunday of a historic election outcome that will dismantle a 30-year African National Congress (ANC) majority, an announcement that will start the clock on a frenzied race to form a new ruling coalition. Voters, angry at joblessness, inequality and power shortages, slashed support for…