fix(@angular-devkit/build-angular): preserve css type for jasmine.css

We should only force the type for files that we know are JavaScript.
Otherwise we risk breaking the magic type detection done by Karma.

The previous code broke for `jasmine.css`.

Fixes angular#29190

Author: hybrist

packages/angular_devkit/build_angular/src/builders/karma/application_builder.ts

@@ -156,7 +156,7 @@ class AngularPolyfillsPlugin {
               // page load. `type` won't affect them.
               continue;
             }
-            if ('js' === (f.type ?? 'js')) {
+            if (f.pattern.endsWith('.js') && 'js' === (f.type ?? 'js')) {
               f.type = 'module';
             }
           }