SAN DIEGO — An advisory group appointed by Mayor Kevin Faulconer recommended Monday that the Chargers contribute $300 million toward a new $1.33 billion stadium with the NFL giving $200 million, the city and county $121 million each and personal seat licenses totaling $120 million.Under intense pressure from the team and the NFL, the Citizen’s Stadium Advisory Group said in its financing plan that there won’t be tax increases or increases to the city’s general fund and that the financing plan doesn …