Add a managed-by-origin-location annotation

packages/catalog-model/src/location/annotation.ts

@@ -15,3 +15,5 @@
  */
 
 export const LOCATION_ANNOTATION = 'backstage.io/managed-by-location';
+export const ORIGIN_LOCATION_ANNOTATION =
+  'backstage.io/managed-by-origin-location';

packages/catalog-model/src/location/index.ts

@@ -20,4 +20,4 @@ export {
   locationSpecSchema,
   analyzeLocationSchema,
 } from './validation';
-export { LOCATION_ANNOTATION } from './annotation';
+export { LOCATION_ANNOTATION, ORIGIN_LOCATION_ANNOTATION } from './annotation';