zeta: Show keybinding in completion rating buttons in review modal (#22985)

This PR also removes the `ThumbsUp` action that wasn't being triggered
correctly. We didn't have it's counterpart `ThumbsDown`, too, so I
mostly assumed it would be harmless to remove `ThumbsUp` as well.

<img width="800" alt="Screenshot 2025-01-10 at 6 18 44 PM"
src="https://github.com/user-attachments/assets/9fd5da9f-9dff-454d-9f31-c02f1370b937"
/>

Release Notes:

- N/A

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Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>
1e0ded4febDanilo Leal committed on 1/10/2025, 10:00:11 PM· committed by GitHubparentdad1a3b
2 files changedLine totals unavailable