MADRID — Sunday’s election in Spain’s most populous region — Andalusia — will set the tone for what kind of conservatives will be in pole position to confront Socialist Prime Minister Pedro Sánchez in next year’s general election. The center-right People’s Party is currently ahead in national polls but this weekend’s contest in the crucial southern region of 9 million people — with a bigger population than EU countries such as Bulgaria, Denmark or Ireland — will probably determine whether it