[Sanitizers][Darwin] Add atos-canary test (#209338)
We've observed tests using atos symbolizer ocasionally failing for
several test runs on x86_64 machines, then stabilizing again. We were
unable to reproduce
this with local builds, so it's unclear what the root cause is.
To help investigate similar failures in the future, we're adding a test
exercising atos itself. Should atos start to fail again, this test
should fail too, and provide way more info helping debugging than other
tests do
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Co-authored-by: Mariusz Borsa <m_borsa@apple.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
