Fix linting dev directories (#38514)

stylelint.config.js

@@ -5,8 +5,7 @@ module.exports = {
     'coverage/**/*',
     'node_modules/**/*',
     'public/assets/**/*',
-    'public/packs/**/*',
-    'public/packs-test/**/*',
+    'public/packs*/**/*',
     'vendor/**/*',
   ],
   reportDescriptionlessDisables: true,