PARIS (Reuters) - Airbus has teamed up with the Quebec government to buy Bombardier's 33.5% stake in the A220 passenger jet programme, completing the Canadian firm's exit from civil aviation and boosting Airbus's position in a new battleground with Boeing. Under the terms of Thursday's deal, Airbus's stake in the A220 programme - known as Airbus Canada - increases to 75% from 50.1%, while Quebec's holding rises to 25%.In taking the larger holdings, the European aerospace group and Canadian..