A state appeals panel ruled that a group simply being Chicago taxpayers does not provide legal standing to challenge the city’s underground parking garage contracts in Grant Park and Millennium Park.The 1st District Appellate Court Friday found that the Independent Voters of Illinois Independent Precinct Organization and Aviva Patt did not have direct or derivative standing as taxpayers to challenge the constitutionality of the city’s agreement with LMG2 LLC.The panel upheld Cook County Circuit Judge Rodolfo …