Spotify, LinkedIn and others are trying to dig out of a digital sewage heap full of low-quality content made with artificial intelligence. (Lia Sued C./The New York Times) By TIFFANY TSU The worst of artificial intelligence slop has cluttered Google searches with recipes for glue-topped pizza, Amazon listings with sham biographies and Facebook feeds with images of Shrimp Jesus. The digital sewage heap has sprawled across tech platforms, cheapening meaningful content and polluting the…