HOUSTON — Heidi Cruz is working in Houston again after leaving her job to help her husband, U.S. Sen. Ted Cruz, R-Texas, in his failed bid for the Republican party nominee for president. Cruz returned to New York-based Goldman Sachs Group Inc.’s (NYSE: GS) Houston office in a newly created role focusing on new clients and strategic relationships, according to the Houston Chronicle. The Houston office is in the southwest region for the global investment banking firm. She’ll report to David Fox,…