Fix flakey XCTest parallel test failure reporting #528

Job	Run time
Test / Windows (5.9 - windows-2022)	6m 55s
Test / Linux (5.8 - jammy)	2m 52s
Test / Windows (6.0 - windows-2022)	3m 33s
Test / Linux (5.9 - jammy)	2m 37s
Test / Windows (nightly-6.1 - windows-2022)	6m 37s
Test / Linux (5.10 - jammy)	3m 2s
Test / Linux (6.0 - jammy)	2m 42s
Soundness / Documentation check	0s
Soundness / API breakage check	0s
Soundness / Broken symlinks check	3s
Soundness / Format check	0s
Soundness / License headers check	0s
Soundness / Shell check	34s
Soundness / Python lint check	7s
Soundness / Unacceptable language check	3s
Soundness / YAML lint check	2s
	29m 7s

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