Image controller: don't attempt upload when adopting

When an image is to be adopted, the controller would still attempt to
upload content when it observed the image in the queued state after
having been created externally. This didn't result in incorrect
behaviour because API validation ensures that images for adoption don't
specify a source. This meant that no upload could be attempted, but it
did result in a spurious error message reported both to the user and in
the logs.

internal/controllers/image/reconcile.go

@@ -143,6 +143,15 @@ func (r *orcImageReconciler) reconcileNormal(ctx context.Context, orcImage *orcv
 
 	// Newly created image, waiting for upload, or... previous upload was interrupted and has now reset
 	case images.ImageStatusQueued:
+		// Don't attempt image creation if we're only adopting
+		if orcImage.GetControllerOptions().GetOnCreate() == orcv1alpha1.ControllerOptionsOnCreateAdopt {
+			addStatus(withProgressMessage("Waiting for glance image content to be uploaded externally"))
+
+			return ctrl.Result{
+				RequeueAfter: waitForGlanceImageStatusUpdate,
+			}, err
+		}
+
 		if ptr.Deref(orcImage.Status.DownloadAttempts, 0) >= maxDownloadAttempts {
 			return ctrl.Result{}, capoerrors.Terminal(orcv1alpha1.OpenStackConditionReasonInvalidConfiguration, fmt.Sprintf("Unable to download content after %d attempts", maxDownloadAttempts))
 		}