test: Fix ordered publish failure test by forcing scheduled work to be done

[michaelpri10]

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• [x] Make sure to open an issue as a bug/issue before writing your code! That way we can discuss the change, evaluate designs, and agree on the general idea
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Fixes #1861 ☕️

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[michaelpri10]

Seeing the PublisherImplTest still timing out, so doing some more investigation.

[michaelpri10]

/gcbrun