text: Title: `IMPORT_EXPORT_SKIP_ADMIN_LOG` is not tested
  Body: **Describe the bug**
  
  There is no integration test to check whether `IMPORT_EXPORT_SKIP_ADMIN_LOG` works if enabled.
  
  There should be integration tests which ensure that admin log creation is skipped appropriately.
  [This test](https://github.com/django-import-export/django-import-export/blob/289e43e1f09ad9cae8355d788fc66c99b8b89d60/tests/core/tests/admin_integration/test_import_functionality.py#L245) is the closest we have.
  
  