chore: DNM event leak demo build

[LFDanLu]

Closes

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

🧢 Your Project:

[rspbot]

Build successful! 🎉

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[nwidynski]

Thanks for the build 👍

TLDR; I did not test for every possible interaction for now and also limited the assertions to grid interaction keys only. It's very likely that additional components will also fail when tested more throughly. Point of this demo was to hightlight that many components, not only nested collections, will cause problems when used inside grids.

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