By George Georgiopoulos ATHENS (Reuters) – A Greek prosecutor said on Thursday she had begun an investigation into an allegation by a journalist that his smartphone had been infected by surveillance software in an operation by the country’s intelligence service. A spokesman for the EYP intelligence service told Reuters it had no comment on Greek media reports detailing the assertion by Thanasis Koukakis, 43, a financial journalist who works for CNN Greece and has done investigative reporting on financial crimes. The allegation comes as the European Union (EU) is beginning to follow the United …