FRANKFURT (Reuters) -The European Central Bank may need to raise interest rates to a level that restricts economic growth in order to cool demand and combat unacceptably high inflation, ECB President Christine Lagarde said on Tuesday. The ECB has been raising rates at the fastest pace on record but inflation is still rising and even longer-term expectations, a key focus for policymakers, are starting to move above the bank’s 2% target. “If there were evidence that high inflation risked de-anchoring inflation expectations, then the policy rate that is compatible with our target would lie in res…