Changes to List storage plans

added the new volume enum value to the data/items/attributes/storage_type response property for the response status 200

removed the optional property data/items/attributes/regions/items/pricing/BRL from the response with the 200 status

removed the optional property data/items/attributes/regions/items/pricing/USD from the response with the 200 status

removed the optional property data/items/attributes/locations from the response with the 200 status

removed the optional property data/items/attributes/pricing from the response with the 200 status

added the new optional query request parameter filter[storage_class]

added the new optional query request parameter filter[storage_type]

added the optional property data/items/attributes/regions to the response with the 200 status

added the optional property data/items/attributes/storage_class to the response with the 200 status

added the optional property data/items/attributes/storage_type to the response with the 200 status