By Brian Ellsworth and Lisandra Paraguassu SAO PAULO (Reuters) -Former Brazilian President Luis Inacio Lula da Silva on Sunday defeated incumbent Jair Bolsonaro in an election that marked a stunning comeback for the leftist leader and the end of the country’s most right-wing government in decades. Lula had 50.8% of votes compared with 49.2% for Bolsonaro with 99.1% of voting machines counted, which the Supreme Electoral Court said was enough to “mathematically define” the outcome of the race. The vote was a rebuke for the fiery far-right populism of Bolsonaro, who emerged from the back benches…