Restore: Sync Gutenberg @ 487a096a9782ba6110a7686d7b4b2d0c55ed1b06

See changelog in 7ac6151

> Build/Test Tools: Stop generating unminified `.min` file.
> The generated `wp-includes/assets/script-loader-packages.min.php` and `wp-includes/assets/script-modules-packages.min.php` files are not actually minified. Additionally, the only purpose they serve is to pass a different script handle to the script loader (`.min.js` vs. `.js`).
>
> This eliminates the need for those files entirely since the difference in file size is negligible, and a human-readable version is more useful.

Author: desrosj