By Sai Ishwarbharath B and Haripriya Suresh BENGALURU (Reuters) -Indian IT services company LTIMindtree announced on Monday that it had won its largest-ever deal, with two sources aware of the matter pegging the size at $580 million. The sixth largest software services exporter in India said the deal was with a leading global media and entertainment company, but did not disclose the name of the client. The company did not immediately respond to a request for comment on the size of the deal or the name o ...