By Guy Faulconbridge LONDON (Reuters) -President Vladimir Putin said on Thursday that he was glad some foreign companies had left Russia because home-grown businesses could take their place, and he warned the West that Moscow would still find ways to acquire advanced technology and luxury goods. Putin has cast the invasion of Ukraine as a turning point in Russian history: a revolt by Moscow against the United States, which he says has humiliated Russia since the 1991 fall of the Soviet Union. Ukraine says it is fighting for its survival. Besides the death and horror of war, the conflict and th…