MILAN (Reuters) -Carmaker Stellantis will stop operations at its key Melfi plant in southern Italy from late June 28 to July 2 due to a “structural” shortage of semiconductors, the UILM union said on Thursday. A spokesman for the Italian-French carmaker confirmed the news and said it had been taking decisions on its operations on a day-by-day, plant-by-plant basis since the start of the COVID pandemic. “We don’t expect to see a stabilization until the end of 2022,” the spokesman said. The new stoppage – which will follow a production freeze between Friday last week and Saturday this week – mea…