When Tyson Foods invested this week in a company that makes veggie burgers, it shocked industry observers. After all, Tyson isn’t just a company that dabbles in meat — it’s America’s largest processor and seller of all things carnivorous. Indeed, there seemed to be no reason for the Arkansas-based behemoth, valued at $26 billion and known for its massive national network of beef, poultry, pork and egg farms, to purchase a 5 percent stake in Beyond Meat, a California-based maker of…