COPENHAGEN (Reuters) -Carlsberg will exit the Russian market and take a “substantial” non-cash impairment charge, the Danish brewer said on Monday, the latest Western company to exit amid mounting pressure on Russia following its invasion of Ukraine. Dutch brewer Heineken also announced on Monday it had decided to exit its Russian business at a cost of 400 million euros ($438 million). “We have taken the difficult and immediate decision to seek a full disposal of our business in Russia, which we believe is the right thing to do in the current environment,” Carlsberg said. “Upon completion we w…