`<img>` with empty `alt` but a name should have a role of `img`

[Jym77]

As per recent change in HTML AAM / ARIA in HTML, images with an empty alt but another naming mechanism get a role of img, not presentation.

• This works both for aria-label(ledby) and title, the other ways of naming images.
• TODO: check when these are empty whether UA still default to them.

[Jym77]

This is very similar to <aside>, <form> and <region>.
All are named by authoronly.
could get an approximation to just detect aria-label, title, and existing aria-labelledby. Without resolving aria-labelledby.