Recognize that some components are always aria-hidden

[tusooa]

For example, with Font Awesome Icons, the resulting svg is (by default) aria-hidden, so if they are used inside a button, I want to force people to have an alt text for that button, but at the same time, if FAIcon is used on its own (not inside a button), I do not want to force people to label it (because it won't be visible for screenreaders).