快递费率提供者-DeliveryRateProvider union
费率定义或参与者提供的费率。
可能的类型
[DeliveryParticipant](https://shopify.dev/docs/admin-api/graphql/reference/shipping-and-fulfillment/deliveryparticipant)
[DeliveryRateDefinition](https://shopify.dev/docs/admin-api/graphql/reference/shipping-and-fulfillment/deliveryratedefinition)