Handle unexpected error when the test is aborted

[luolanzone]

When the conformance test is aborted by Jenkins, the results log is actually an incomplete file, we need also to check if there is a complete text for e2e test result. Otherwise, the result will show All tests passed. when the test is actually running and aborted unexpectedly, which is misleading.

[XinShuYang]

/test-all /test-windows-all

[github-actions[bot]]

This PR is stale because it has been open 90 days with no activity. Remove stale label or comment, or this will be closed in 90 days

[tnqn]

/test-all