By Belén Carreño, Borja Suárez and Joan Faus MADRID/LAS PALMAS (Reuters) – Spain is shifting its foreign policy towards Africa while lobbying the EU and NATO for support to address migration from the continent, aggravated by the Ukraine invasion, two senior government officials and two diplomatic sources told Reuters. Spain will use a NATO summit in Madrid this week to press its case, and is likely to ask for increased intelligence sharing by the alliance including on issues related to migration, the diplomats said. Even before Russia’s Feb. 24 invasion of Ukraine, Socialist prime minister Ped…