chore: [datamanager] update publish name to PA (#6999)

* chore: update publish name to PA

PiperOrigin-RevId: 856433572

Source-Link: googleapis/googleapis@fe3d759

Source-Link: googleapis/googleapis-gen@3108d58
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* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

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Author: gcf-owl-bot[bot]