Firefox now adds tab stops for scrollable elements

# 🐛 Bug Report

In recent Firefox versions, any overflow: auto element is tabbable by default, and renders a default focus ring. This was fixed for TableView in https://github.com/adobe/react-spectrum/pull/3520 but it affects other components as well. For example in DatePicker:

## 🤔 Expected Behavior

Elements with scrolling shouldn't necessarily be tabbable.

## 😯 Current Behavior

Some elements are now tabbable that shouldn't be.

## 💁 Possible Solution

Go through all the components with scrolling in Firefox and verify that there aren't extra tab stops. Add `tabIndex={-1}` to override and verify that this doesn't cause other issues (e.g. with screen readers?).

## 🧢 Your Company/Team

RSP