Michael Francis, a key player at Target Corp. during the discounter’s heyday in the 2000s, has been appointed chief customer officer at Old Navy and head of marketing shared services at Gap Inc. On Wednesday, the San Francisco-based retail giant said Francis will lead Old Navy ’s “end-to-end customer strategy, with responsibility for strengthening brand storytelling, deepening customer engagement, and evolving the customer experience across touchpoints.”  As head of the marketing shared services group, a new position at Gap Inc. , Francis will oversee media strategy and execution and “help drive greater integration and effectiveness across the company’s portfolio of brands,” which includes Gap, Banana Republic and Athleta as well as Old Navy. Francis is best known for playing a pivotal role as Target’s chief marketing officer, molding the store’s “cheap chic” identity by tying low prices to trendy, modern designs.…