AMC Entertainment Holdings Inc. CEO Adam Aron has expressed the movie-theater chain’s “eternal gratitude” to Taylor Swift as the singer-songwriter’s concert film breaks another record.Variety reported Sunday that “Taylor Swift: The Eras Tour” has earned more than $261.6 million globally, making it the highest-grossing concert and documentary film in history, surpassing “Michael Jackson’s This Is It.”“Now at$261.6 million globally, AMC’s first ever released film, TAYLOR SWIFT | THE ERAS TOUR just became the ...