When ember-template-imports gets added all .js files end up including new inline sourcemaps.

Quick summary:

1. ember-template-imports adds a custom preprocessor for .js files here
2. that preprocessor (from here) calls preprocessEmbeddedTemplates
3. that uses magic-string to process specific template-literals
4. it uses magic-string for all .js files, it ends up including sourcemaps for every .js file regardless if there were any templates in it

Tldr; we should change

https://github.com/ember-template-imports/ember-template-imports/blob/72f11d2f145bc20e1912339475ef17023fa4722f/src/preprocess-embedded-templates.ts#L257-L268

to something like:

const hasChanges = template !== output;
if (includeSourceMaps && hasChanges) {
   const { dir, name } = path.parse(relativePath); 
  
   const map = s.generateMap({ 
     file: `${dir}/${name}.js`, 
     source: relativePath, 
     includeContent: true, 
     hires: true, 
   }); 
  
   output += `\n//# sourceMappingURL=${map.toUrl()}`; 
}