[otelarrowexporter] Deflake TestSendArrowTracesNotSupported #200
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There is a test flake, seen here. I believe this is for failing to shutdown the service, which causes a 100s long run-time. This does not explain a deadlock, but we aren't sure that has happened, vs a timeout due to CPU shortage.
https://github.com/open-telemetry/otel-arrow/actions/runs/9180018006/job/25243494523