GHSA-F8GF-W286-FMQ2 vm2: `allowAsync: false` can be bypassed through Promise thenable assimilation in VM and NodeVM

Summary When allowAsync is set to false, vm2 is expected to reject attempts to run asynchronous code. Direct use of Promise.prototype.then is blocked, but Promise static methods still assimilate attacker-controlled thenables. Promise.resolvethenable, Promise.allthenable, Promise.racethenable,...