LONDON (Reuters) – British rock band Pink Floyd will release a new song on Friday to raise money for humanitarian relief in Ukraine, featuring the vocals of a Ukrainian singer who quit an international tour to fight for his country and was wounded. The single “Hey Hey, Rise Up” – Pink Floyd’s first original new music in almost 30 years – was recorded last week and highlights singing by Andriy Khlyvnyuk from Ukrainian band Boombox, which was taken from a social media post https://www.instagram.com/tv/CafIcMyANKo/?utm_medium=copy_link. Pink Floyd guitarist David Gilmour said he learned that Khly…