When Michelle Woodward, the founder of the local salads-and-bowls restaurant Diced, was thinking of expanding her young business, downtown Raleigh was not on her radar at all. But now hers is one of several restaurants that have opened on Fayetteville Street in the past year, as part of an intense recruitment effort by the region’s largest office landlord Highwoods Properties, which has offered favorable deals to several businesses in the hopes…