The goal of using artificial intelligence to transform drug discovery and development may not be novel. But a new alliance is unique in both the stature of companies belonging to it and its choice of an innovation model. Big Pharma firms AstraZeneca (LON:AZN), Merck KGaA (ETR: MRK), Pfizer (NYSE:PFE) and Teva (NYSE:TEVA) will partner with Amazon…