Rebecca Rubin Film and Media ReporterMarvel’s “Thor: Love and Thunder” managed to fend off three new nationwide releases to remain the No. 1 movie in North America.Though ticket sales for “Thor” cratered in its second weekend, falling by 68% to $46 million from 4,375 theaters, the latest installment in Disney’s Marvel Cinematic Universe easily towered over a trio of newcomers: Sony’s literary adaptation “Where the Crawdads Sing,” Paramount’s animated “Paws of Fury: The Legend of Hank” and the Focus Features period drama “Mrs.