fix(product): Correctly fetch category descendants by handle (#13579)

This PR fixes the issue #13518  where product category descendants were not retrieved when
filtering by handle with the include_descendants_tree flag. The handle filter was not
being correctly removed before the descendant tree query was executed.

packages/modules/product/src/repositories/product-category.ts

@@ -182,6 +182,7 @@ export class ProductCategoryRepository extends DALUtils.MikroOrmBaseTreeReposito
     } as MikroOptions<any>
 
     delete where.id
+    delete where.handle
     delete where.mpath
     delete where.parent_category_id