The abort_multipart_upload() method aborts a multipart upload after it was initiated.
After a multipart upload is aborted, no additional parts can be uploaded using the upload ID of that multipart upload. The storage consumed by any previously uploaded parts will be freed. However, if any part uploads are currently in progress, those part uploads might or might not succeed. As a result, it might be necessary to abort a given multipart upload multiple times in order to completely free all storage consumed by all parts.