Move uglify-js's config back to CLI. (#24147)

We need to pass different options and this seems cleaner at this point.

In order for docs.min.js to keeps all comments, we don't pass `compress`.

build/uglifyjs.config.json

@@ -1,8 +0,0 @@
-{
-  "output": {
-    "comments": "/^!/"
-  },
-  "compress": {
-    "typeofs": false
-  }
-}