Code snippet generation for delta queries for Kiota based SDKs need to be updated to use deltaLink parameter

[maisarissi]

As part of the conversation in microsoftgraph/msgraph-metadata#354 it was identified that we should update the code snippet generation logic for delta endpoints for Kiota-based versions to use deltaLink instead of deltaToken.

Per this comment, an example would be:

var requestBuilder = new UsersDeltaRequestBuilder("deltaLink", client.RequestAdapter);
var firstPage = await requestBuilder.GetAsync();