upload/koji: don't pass task_id to cg_init_build

Contrary to our assumption, we cannot initialize the build with the
link to the task. We can only update the link once the build has
completed.

This seems like a bug in koji, but we keep it like this for now.

cmd/osbuild-worker/main.go

@@ -228,6 +228,7 @@ func RunJob(job worker.Job, store string) (*osbuild.Result, error) {
 
 			build := koji.ImageBuild{
 				BuildID:   options.BuildID,
+				TaskID:    options.TaskID,
 				Name:      options.Name,
 				Version:   options.Version,
 				Release:   options.Release,