By Catarina Demony LISBON (Reuters) – Portugal said on Thursday it would not strip the citizenship of Chelsea soccer club owner Roman Abramovich for now because that measure was not part of EU sanctions against Russian oligarchs, but his nationality status could change depending on the outcome of an inquiry. Britain on Thursday imposed sanctions on the 55-year-old, who has Israeli and Portuguese citizenship, in an escalation of measures against associates of Russian President Vladimir Putin after the Kremlin’s Feb. 24 invasion of Ukraine. In a statement sent to Reuters, the Portuguese justice …