[Flaky CI]: AssertionError: assert {'id': 25, 'i...d': None, ...} == {'integration...y': None, ...}

### Flakiness Type

Assertion failure

### Name of Job

backend

### Name of Test

tests/sentry/workflow_engine/handlers/action/notification/test_metric_alert.py::TestBaseMetricAlertHandler::test_invoke_legacy_registry

### Link to Test Run

https://github.com/getsentry/sentry/actions/runs/13954892986/job/39063431349

### Details

Flaky test failed hard after 5x retry.

```
AssertionError: assert {'id': 25, 'i...d': None, ...} == {'integration...y': None, ...}

Omitting 5 identical items, use -vv to show
Left contains 1 more item:
{'id': 25}

Full diff:
{
+ 'id': 25,
'integration_id': '$BIGINT',
'sentry_app_config': None,
'sentry_app_id': None,
'target_display': None,
'target_identifier': 'channel456',
}
```