WIP: fix(DnD): avoid unnecessary re-renders when drag modality changes.

[reidbarber]

Closes #2504

Related #2403

Adds useDynamicDescription, an alternative to useDescription that reuses the description node and id to avoid excessive re-renders when the description text changes. Fixes the issue where changing drag modality causes all the drop targets on a page to re-render.

TODO: might need a mechanism to ensure shared elements aren't changed when another consumer still relies on the old text (not an issue for modality change since it's global, but might come up somewhere else).

TODO: Investigate why some tests are failing only in React 18

✅ 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:

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