fix: fix page scrolling when Trays are opened a second time on iOS 18

[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:

In iOS 18, go to the old V3 Picker docs and open the Picker twice. The page should not scroll upon the second open. In newer iOS, the same behavior should happen, be sure to test other overlays to make sure nothing broke

🧢 Your Project:

RSP

[rspbot]

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