About a decade ago, Databricks got an acquisition offer at roughly six times its valuation at the time. CEO Ali Ghodsi tells the story of the conversation with Ben Horowitz that made him turn it down: Ben: "You just don't get this good of a market opportunity with this good of an entrepreneur. That's the rarest of rare things." "We see great entrepreneurs, but their market opportunity is limited, and then we see companies that have a great market opportunity, but the entrepreneur is not big…