No, I am afraid you can’t do this.
For example, if I have an editor template under this folder
That’s no longer an editor template. It’s a partial. If you want to share editor templates between different controllers you can simply put them inside the ~/Views/Shared/EditorTemplates folder.
As far as subfolders are concerned then you could do this:
@Html.EditorFor(x => x.Foo, "Order/ProductModel")
which will render the ~/Views/CurrentController/EditorTemplates/Order/ProductModel.cshtml or ~/Views/Shared/EditorTemplates/Order/ProductModel.cshtml editor template.