By Karin Strohecker and Jorgelina do Rosario LONDON (Reuters) – Ukraine aims to strike a deal for a $15-$20 billion programme with the International Monetary Fund before year-end to help shore up its war-torn economy, the country’s central bank governor Kyrylo Shevchenko told Reuters. Battered by Russia’s invasion launched on Feb. 24, Ukraine faces a 35%-45% economic contraction in 2022 and a monthly fiscal shortfall of $5 billion and is heavily reliant on foreign financing from its Western partners. Shevchenko, 49, speaking during his visit to London, also said he hoped to agree on a swap lin…