catalog-model: fix alpha API report warnings

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/catalog-model/alpha-api-report.md

@@ -3,12 +3,9 @@
 > Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
 
 ```ts
-import { JsonObject } from '@backstage/types';
+import { Entity } from '@backstage/catalog-model';
 import { SerializedError } from '@backstage/errors';
 
-// Warning: (ae-forgotten-export) The symbol "Entity" needs to be exported by the entry point alpha.d.ts
-// Warning: (ae-unresolved-link) The @link reference could not be resolved: The package "@backstage/catalog-model" does not have an export "Entity"
-//
 // @alpha
 export interface AlphaEntity extends Entity {
   status?: EntityStatus;

packages/catalog-model/src/entity/AlphaEntity.ts

@@ -14,11 +14,13 @@
  * limitations under the License.
  */
 
-import { Entity } from './Entity';
+// TODO(Rugvip): Figure out best way to allow this import
+// eslint-disable-next-line import/no-extraneous-dependencies
+import { Entity } from '@backstage/catalog-model';
 import { EntityStatus } from './EntityStatus';
 
 /**
- * A version of the {@link Entity} type that contains unstable alpha fields.
+ * A version of the `Entity` type that contains unstable alpha fields.
  *
  * @remarks
  *