Two Helix failure entries for a single test failure

[matouskozak]

In some cases, failures are incorrectly duplicated, thus causing confusion while triaging.

For example, https://dev.azure.com/dnceng-public/public/_build/results?buildId=828263&view=ms.vss-test-web.build-test-results-tab&runId=21538738&resultId=144084&paneView=debug

The highlighted failures are the same, yet they appear as two separate ones. They both contain the same log files as well.

I'm unsure whether this is an issue of how xHarness is reporting failures to Helix or somewhere else (AzDo/BuildAnalysis). Possibly related to the same issue as described https://github.com/dotnet/runtime/issues/106319#issuecomment-2291990487.