specify unique behavior for label attribute on option in datalist

[scottaohara]

within a select element, if an option has a label attribute and child content, the label attribute value renders and the child content does not.

but within a datalist, if an option has both a label attribute and child content, both will render.

browsers expose this differently - where chromium exposes both pieces of information, firefox renders both but only exposes one, and safari only renders and exposes one of the two.

this needs cleanup

[spectranaut]

Discussed briefly in triage: https://www.w3.org/2024/11/14-aria-minutes.html#ffff

We could bring up in meeting to try to find someone who wants to champion recommending a way forward.