By Giuseppe Fonte ROME (Reuters) -Russia’s invasion of Ukraine has prompted Italy to put on hold its share of financing for the $21 billion Arctic LNG 2 project led by privately-owned Russian gas producer Novatek, two sources close to the matter told Reuters on Tuesday. Western allies have taken unprecedented steps to isolate Russia’s economy and financial system following the assault on Ukraine, which Moscow calls a “special operation.” The energy sector has so far been spared, but sanctions targeting the industry remain on the table, White House press secretary Jen Psaki said on Monday. The …