By Maki Shiraki and David Dolan TOKYO (Reuters) -Nissan Motor Co and Renault SA are moving towards an agreement that involves sweeping changes to their two-decade-old automaking alliance and will release a statement on Monday, two people familiar with the matter said. The restructured alliance, which has been in the works for nearly four months, will likely see Renault cut its stake in Nissan to around 15% from 43%, Reuters has reported, as well as seeing Nissan invest in the French automaker’s new electric vehicle unit. The contents of the statement to be released on Monday were not immediate…