BERLIN (Reuters) -Ukraine will launch an international campaign to prevent Russian athletes from being allowed to compete in the Paris 2024 Olympics, President Volodymyr Zelenskiy said on Friday. Sports Minister Vadim Guttsait earlier said Ukraine would not rule out boycotting the Games if Russian and Belarusian athletes took part. They have been banned in some sports while they are allowed to compete under a neutral flag in others. The International Olympic Committee (IOC), eager to see them back in major competitions, said on Wednesday the Olympic Council of Asia had offered Russian and Bela…