Manori Ravindran International EditorSome A-list actors get treated like rock stars at film festivals, but when the real rock stars arrive, it’s another level of fandom.Jimmy Page, the 77-year-old lead guitarist of Led Zeppelin, received a hero’s welcome in Venice on Saturday, where “Becoming Led Zeppelin,” the band’s first proper documentary since the band’s conception in 1968, premiered to bursts of rapturous applause across its 137-minute runtime.The film received a standing ovation that may