Skips `TestSignalWakeSendMessage`, which flakes because the current
chatd control notification flow can deliver stale status notifications
after a new processing run starts.
This mirrors the existing CODAGT-353 skips for the same
stale-notification class and leaves the deterministic fix to that
notification-flow refactor.
Refs
https://linear.app/codercom/issue/ENG-2727/flake-testsignalwakesendmessage
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