By Saikat Chatterjee LONDON (Reuters) – The euro’s drop to a five-year low is rekindling the possibility the currency will reach parity versus the dollar for the first time in two decades, as fears of a euro zone recession encourage investors to pile on the bearish bets. Russia’s move to cut off gas supplies to Bulgaria and Poland is the latest blow for the currency, already pressured by the twin headwinds of a surging dollar and sweeping COVID-linked lockdowns in China, a major market for bloc exports. Germany and other European countries could be next in line for restrictions on gas. “The em…