feat: Add focusableRef support to DateInput

[hasegawa-101]

Closes #7756

✅ 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:

[snowystinger]

Thanks for fixing that. We had a little discussion on Friday about this plus the ask for the inputRef, so we're revisiting a little because that's a lot of refs. I doubt we'll reach a decision on how to reduce the overall number before the new year, just to give you a heads up.
I'm approving for now