Related to #2597.

Currently the devx is not great for handling Delta calls. When the user gets the deltaLink back they need to create a new instance of the RequestBuilder but it is not obvious what the type is. By implementing Clone the developer can create a new instance of the Requestbuilder based on the provided path rather than the default one provided by the hierarchy.

e.g.

   var changes = graphClient.Users.ToClone(deltaLink).GetAsync()