Ship the new utility.cmd script on Windows

Followup of https://github.com/OpenRA/OpenRA/pull/6764 and taking the criticism of @MicroJOo into account that this isn't easy to spot by adding it to the start menu.
IMO this is anti-polish.  People who are modding the game will already be digging around in the installation directory, and will not need a start menu shortcut.  This only serves to expose a scary text window to general players who don't want or need it.