[playground-tests] Flaky `EventHubs` test in `TestEndpointsReturnOk`

## Build Information
Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=818717
Build error leg or test failing: Aspire.Playground.Tests.AppHostTests.TestEndpointsReturnOk
Pull request: N/A

## Error Message

Fill the error message using [step by step known issues guidance](https://github.com/dotnet/arcade/blob/main/Documentation/Projects/Build%20Analysis/KnownIssueJsonStepByStep.md).

```json
{
"ErrorMessage": " Timed out waiting for the consumer message to be logged: 'Hello, from /test sent via producerClient'",
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}
```

📊 **[View CI Failure Report](https://github.com/microsoft/aspire/issues/5959#issuecomment-4174839275)**