[Concurrency] Harden task group test which is sensitive to timing #75612
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rdar://132887522
ktoso
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@swift-ci please smoke test |
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rdar://132887522
Pretty confident that this was a timing issue; we didn't see the task cancelled so the output wasn't the "cancelled path" which we're trying to test at all.
Giving this more leeway and debug output will help on very slow host machines.