feat: expose shouldFocusOnHover prop for ListBox

[lucasweng]

Closes #7989

✅ 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:

• Added tests to cover shouldFocusOnHover behavior, including focusing options on hover and navigating via keyboard.
• The "List Box Example" story in RAC storybook already has a working shouldFocusOnHover control to manually verify the behavior.

🧢 Your Project:

[uncvrd]

Thanks for submitting this PR, I would also appreciate if this were merged. Here's my use case:

I'm using an autocomplete component with ListBox

I need to take advantage of the AutocompleteStateContext so I can access the focusedNodeId and display some additional content in a sidebar when an item is focused. (i.e. a details panel of more information of the focused item)

Since hovering doesn't enable focus on a listbox, the sidebar with the preview content wasn't updating via mouse unless I used the keyboard controls.

Adding this prop and using "ts-ignore" will work for now, but would make me feel comfortable knowing this is a supported type. 🙏

just as a sidebar, it took me quite a while to figure out that shouldFocusOnHover is added to certain hooks like useSelect and I couldn't figure out why my sibling listbox to my autocomplete was not behaving the same way as my listbox in my select for a while

and doubly confusing that the MenuItem Autocomplete (in the example docs) was receiving the focus props without being a select 😅