Changed State Format for Aggregate Functions: varSamp, varPop, stddevSamp, stddevPop, covarSamp, covarPop, corr

Changed the state format for aggregate functions varSamp, varPop, stddevSamp, stddevPop, covarSamp, covarPop, corr. If you have stored states of these aggregate functions in tables (using the AggregateFunction data type or materialized views with corresponding states), please write to [email protected].