By Giuseppe Fonte and Alvise Armellini ROME (Reuters) – The Italian government on Tuesday approved a decree that would allow it to later put the troubled former Ilva steel company under special administration, officials told Reuters, amid a clash with main shareholder ArcelorMittal. The fate of Acciaierie d’Italia (ADI), as the group is known, is a major headache for Prime Minister Giorgia Meloni, as its closure would cost thousands of jobs and have serious knock-on effects for the Italian manufacturing sector. ArcelorMittal, the world’s second-largest steelmaker, owns 62% of ADI after taking …