Changes to List Milestones for Incident

added the required property code to the response with the 400 status

added the required property code to the response with the 401 status

added the required property code to the response with the 403 status

added the required property code to the response with the 404 status

added the required property code to the response with the 422 status

added the required property code to the response with the 500 status

api tag Incident Milestones removed

added the required property data/items/attributes/source to the response with the 200 status

added the required property data/items/attributes/user to the response with the 200 status

removed the required property pagination from the response with the 200 status