Changes to Add line once (for next order)

the data response's property type changed from no type to object for status 200

removed the request property discountType

removed the request property discountValue

removed the request property nextOrderId

api operation id add-line-once removed and replaced with add-line-once-for-next-order

added the new optional request property upsellProfileId

added the optional property data/id to the response with the 200 status

added the optional property data/name to the response with the 200 status

added the optional property data/price to the response with the 200 status

added the optional property data/quantity to the response with the 200 status

added the optional property data/shopifyId to the response with the 200 status