Disable focusTrap on `AriaModal`

[nijynot]

There's to no option to disable the focus-trap on the modal.
There's the focusTrapPaused, but that only pauses it, doesn't deactivate.

[chaddjohnson]

It definitely would be useful to have a way to disable the focus trap. Maybe something simple like this:

focusTrapOptions={{
  active: false
}}

or

focusTrapActive={false}

One use case is a designer mode where a preview of a modal, using react-aria-modal, is displayed on page. In this case, a focus trap would be undesirable.

UPDATE: Added a pull request.