NEW YORK — Gov. Kathy Hochul, who has often cast herself as a fierce ally of workers, has vetoed major labor legislation that would have banned noncompete agreements in New York State. The legislation, passed by lawmakers in June, came as part of a national push to limit the use of noncompete pacts, which block employees from leaving their jobs to work at competing employers. The agreements are believed to depress wages; their defenders say they protect trade secrets. Hochul, who had been caught in a tug-of-war between well-funded labor and business interests over the bill, sought changes to t…