WIP: Fix canary tests

[reidbarber]

Attempting to fix tests when running with React Canary.

Link.tsx and FocusScopeOwnerDocument.test.js fixes were taken from #6150

TODO: Fix ListBox › async loading › should fire onLoadMore if there aren't enough items to fill the ListBox calling onLoadMore 3 times instead of 1.

✅ 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:

[reidbarber]

Closing for now, will revisit closer to React 19 release.