fix: CheckParts endpoint call to correct API (#10073)

CheckParts is calling the wrong endpoint, so instead of 
checking parts, it is writing metadata.

cmd/storage-rest-client.go

@@ -335,7 +335,7 @@ func (client *storageRESTClient) CheckParts(volume, path string, fi FileInfo) er
 		return err
 	}
 
-	respBody, err := client.call(storageRESTMethodWriteMetadata, values, &reader, -1)
+	respBody, err := client.call(storageRESTMethodCheckParts, values, &reader, -1)
 	defer http.DrainBody(respBody)
 	return err
 }