By Tom Sims, Iain Withers and Megan Davies FRANKFURT/LONDON/NEW YORK (Reuters) -Financial firms from Frankfurt to Wall Street suffered heavy share price falls on Thursday as they grappled with the impact of shockwaves from Russia’s invasion of Ukraine. Deutsche Bank, Germany’s largest lender, said it had contingency plans in place as U.S. and European officials warned of further sanctions on Moscow. British bank Lloyds said it was on “heightened alert” for cyberattacks, while German insurance and asset management giant Allianz said that it had frozen its Russian government bond exposure. Share…