By Federico Maccioni PONTIDA, Italy (Reuters) – The rightist League aims to win the Italian premiership when the country holds an election next week, its leader Matteo Salvini told his party’s annual rally in northern Italy on Sunday. A conservative alliance of parties, including the League, is widely expected to win the Sept. 25 election. But it is likely to be a bittersweet moment for Salvini who has seen his position as undisputed leader of the right usurped by Giorgia Meloni. “For me, it would be a pride, a joy, a thrill to be chosen by you and President Sergio Mattarella as prime minister…