feat: add support for XL Dialog

[synox]

Closes #8694

✅ 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:

Open S2 storybook, Dialog, select XL size, open the dialog

🧢 Your Project:

Adobe/GenStudio

[yihuiliao]

closing in favor of #8820

if you need a dialog with a custom width, you can use a CustomDialog