FRANKFURT (Reuters) – A pension fund for teachers in Arkansas has settled with Allianz and dropped its lawsuit over losses in a multibillion-dollar trading debacle at the German insurer’s funds arm, according to a court document. The Arkansas Teacher Retirement System was the first lawsuit lodged against Allianz in 2020 after the downfall of the $15 billion Structured Alpha funds, a saga that has dogged the German insurer and asset manager for two years. The pension fund is among a number of big investors that have in recent days filed to confirm that they have settled and withdrawn their suit…