By Tom Sims and Alexander Hübner FRANKFURT (Reuters) – Allianz announced on Friday big bonus cuts for its CEO and board, and a settlement with a “vast majority” of investors, as it braces for the outcome of U.S. regulatory investigations into a multibillion-dollar trading debacle at its funds arm. The collapse of a $15 billion set of investment funds during the pandemic market turmoil in early 2020 has cast a shadow over Germany’s most valuable financial firm and one of the world’s largest asset managers. A 3.7 billion euro ($4.2 billion) provision announced on Thursday to deal with a slew of …