This doesn't match the spec that landed in the HTML repo, and we do also want programmatic form submission to set that state.
<rdar://problem/114580382>
Pull request: https://github.com/WebKit/WebKit/pull/17138
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/41676
Committed 267384@main (f4bbd99f53b5): <https://commits.webkit.org/267384@main> Reviewed commits have been landed. Closing PR #17138 and removing active labels.