(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window) * Big euro zone inflation drop spurs hopes for smaller ECB hike * Argenx jumps on deal to buy U.S. FDA priority review voucher * STOXX 600 gains 6.8% in November * Telecom Italia falls as govt aide says full takeover a 'fantasy' (Updates to close) By Susan Mathew and Devik Jain Nov 30 (Reuters) – The STOXX 600 index closed higher on Wednesday and registered its second straight month of gains on hopes of easing COVID curbs in…