[Flaky Test] github.com/elastic/beats/v7/x-pack/filebeat/tests/integration TestDataShapeOTelVSClassicE2E

## Flaky Test

* **Test Name:** TestDataShapeOTelVSClassicE2E
* **Scope:** github.com/elastic/beats/v7/x-pack/filebeat/tests/integration
* **File:** N/A
* **Location:** N/A
* **Buildkite Link:** https://buildkite.com/organizations/elastic/analytics/suites/beats/tests/f6ca3252-3993-8c19-8dc3-195825f755f5
* **Flaky Instances:** 1
* **Latest Occurrence:** 2026-04-08T12:06:13.027Z

### Details

```json
{
"id": "f6ca3252-3993-8c19-8dc3-195825f755f5",
"web_url": "https://buildkite.com/organizations/elastic/analytics/suites/beats/tests/f6ca3252-3993-8c19-8dc3-195825f755f5",
"scope": "github.com/elastic/beats/v7/x-pack/filebeat/tests/integration",
"name": "TestDataShapeOTelVSClassicE2E",
"location": null,
"file_name": null,
"instances": 1,
"latest_occurrence_at": "2026-04-08T12:06:13.027Z",
"most_recent_instance_at": "2026-04-08T12:06:13.027Z",
"last_resolved_at": null,
"ownership_team_ids": [],
"failure_examples": []
}
```

Start with the Buildkite failure for TestDataShapeOTelVSClassicE2E and locate the test within github.com/elastic/beats/v7/x-pack/filebeat/tests/integration. Reproduce the failure and inspect the test's OTel-versus-classic data-shape assertions. Done means the underlying cause is addressed and the integration test passes reliably.

Written by the indexing model from the issue text.