By Flavia Marreiro and Brad Haynes SAO PAULO (Reuters) – Brazilian presidential candidate Luiz Inacio Lula da Silva’s top foreign policy adviser supports the inclusion of Argentina in the BRICS group of developing nations, which could be a forum for negotiating peace in Ukraine, he told Reuters. Celso Amorim, foreign minister during Lula’s 2003-2010 presidency, had a hand in founding the BRICS group along with Russia, India and China. South Africa joined in 2011 and Argentina has been pushing to become the sixth member. “It’s good to have balance within the BRICS, to have a larger role for Lat…