Completes a multipart upload by assembling previously uploaded parts.
This method completes the multipart upload specified by UploadId. The server will assemble all of the parts that have been uploaded into an object named ObjectName.
Note that this method automatically calls ListParts internally to obtain the information needed to complete the multipart upload. This process does not alter the Parts collection, nor does it cause the PartList event to fire.
Note: This method is not supported when ServiceProvider is spGoogleStorage (2); Google Cloud Storage does not support multipart uploads.