Make SetABTests Island server safe

[mxdvl]

What does this change?

Wrap all client-side logic in a useEffect hook.

Test that it will render on a server

Why?

Components should be able to run in any context.

• Split out from 🏝️ All islands must be rendered on the server for maximum safety and consistency 🤗  #8991 to make it easier to review

Screenshots

N/A

[github-actions]

Size Change: 0 B 🆕

Total Size: 0 B

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