ZURICH (Reuters) – Siemens is ramping up its spending on research and development above its rivals, Chief Executive Roland Busch will tell the German engineering group’s shareholders next week. The maker of trains and factory automation software will spend 5.5 billion euros ($6.21 billion) developing new products and services this year, Busch will say, according to the text of a speech he is due to give at the upcoming annual general meeting seen by Reuters. That represents an increase from the 4.9 billion euros Siemens spent on research and development in 2021, corresponding to 7.8% of sales …