By Tim Hepher and Jamie Freed (Reuters) – Russia published a draft law on Thursday that could prevent its airlines returning leased aircraft, raising the stakes in a showdown with Western finance over $10 billion of jets. Sanctions imposed after Russia’s invasion of Ukraine give leasing firms until March 28 to free themselves from deals with Russian airlines, sparking a game of cat-and-mouse as lenders try to seize back jets – with very little success. Under the proposed law drafted by the transport ministry, Russian airlines will pay leases in roubles throughout 2022. If a foreign lessor term…