By Crispian Balmer and Angelo Amante ROME (Reuters) – Italy’s leaders held their final rallies on Friday ahead of a parliamentary election at the weekend that is expected to be won by a rightist alliance, putting Rome on possible collision course with Brussels. A trio of centre-left and centrist groups held their closing meetings in different squares across the Italian capital, underscoring their failure to forge a united electoral pact – a decision that has enormously benefitted the conservative bloc. Opinion polls have all predicted that Giorgia Meloni’s nationalist Brothers of Italy group w…