MUNICH, Germany (Reuters) – Franz Beckenbauer was a great German who became his country’s best ambassador around the world, Germany’s President Frank-Walter Steinmeier said on Friday at a commemoration at Bayern Munich’s Allianz Arena stadium. Steinmeier and Chancellor Olaf Scholz led the long list of attendees that also included a who’s who of German football, past and present, as well as tens of thousands of spectators in the stadium. Beckenbauer, who died at the age of 78 earlier this month, helped modernise soccer and came to personify Germany’s post-war sporting success, captaining his co…