By Tom Hals WILMINGTON, Del (Reuters) – Elon Musk has taken on Detroit’s automakers, short-sellers and securities regulators. Next week, the Tesla chief executive is set to square off in court against an unlikely foe – a thrash metal drummer who hopes to strip Musk of his $56 billion pay. The trial will pit the world’s richest person against one of the electric carmaker’s smallest investors, Richard Tornetta, who held just nine shares when he sued in 2018. Tornetta sued Musk and the Tesla board on behalf of the company in what is known as a shareholder derivative lawsuit. If successful, Musk’s…