Spec change, which currently makes mediation "required": https://github.com/WICG/digital-credentials/pull/149
<rdar://problem/133266859>
Pull request: https://github.com/WebKit/WebKit/pull/32519
Committed 283148@main (58fcbbf0528d): <https://commits.webkit.org/283148@main> Reviewed commits have been landed. Closing PR #32519 and removing active labels.