distro: add URL to OSTreeImageOptions

We need to add the URL to the manifest as an ostree source repo so that
osbuild can pull the commit to embed it in the boot ISO for the new
rhel-edge-installer image type.

internal/distro/distro.go

@@ -97,6 +97,7 @@ type ImageOptions struct {
 type OSTreeImageOptions struct {
 	Ref    string
 	Parent string
+	URL    string
 }
 
 // The SubscriptionImageOptions specify subscription-specific image options

internal/weldr/api.go

@@ -1997,6 +1997,7 @@ func (api *API) composeHandler(writer http.ResponseWriter, request *http.Request
 			OSTree: distro.OSTreeImageOptions{
 				Ref:    cr.OSTree.Ref,
 				Parent: cr.OSTree.Parent,
+				URL:    cr.OSTree.URL,
 			},
 		},
 		api.allRepositories(),