[Flaky Test] github.com/elastic/elastic-agent/testing/integration/k8s TestKubernetesAgentOtel

## Flaky Test

* **Test Name:** TestKubernetesAgentOtel
* **Scope:** github.com/elastic/elastic-agent/testing/integration/k8s
* **File:** N/A
* **Location:** N/A
* **Buildkite Link:** https://buildkite.com/organizations/elastic/analytics/suites/elastic-agent-ci/tests/ff29dd05-5900-87a7-87e7-7196e1a48706
* **Flaky Instances:** 1
* **Latest Occurrence:** 2026-09-01T16:06:44.915Z

### Details

```json
{
"id": "ff29dd05-5900-87a7-87e7-7196e1a48706",
"web_url": "https://buildkite.com/organizations/elastic/analytics/suites/elastic-agent-ci/tests/ff29dd05-5900-87a7-87e7-7196e1a48706",
"scope": "github.com/elastic/elastic-agent/testing/integration/k8s",
"name": "TestKubernetesAgentOtel",
"location": null,
"file_name": null,
"instances": 1,
"latest_occurrence_at": "2026-09-01T16:06:44.915Z",
"most_recent_instance_at": "2026-09-01T16:06:44.915Z",
"last_resolved_at": null,
"ownership_team_ids": [],
"failure_examples_count": 1
}
```

### Failure Examples

**Example 1:**
**Run:** https://api.buildkite.com/v2/analytics/organizations/elastic/suites/elastic-agent-ci/runs/5e9e0c8f-a072-89f0-84e8-08d7481e38a2
**Time:** 2026-09-01T16:05:20.522Z
**Stacktrace:**

```
=== RUN TestKubernetesAgentOtel
--- FAIL: TestKubernetesAgentOtel (134.13s)
```

Start with TestKubernetesAgentOtel in github.com/elastic/elastic-agent/testing/integration/k8s and inspect the linked Buildkite run and its single failure example. The issue provides no file, location, or useful stack trace, so determine the intermittent failure from the test and CI evidence; done means the test no longer flakes under the relevant runs.

Written by the indexing model from the issue text.