Resolve WebCodecsVideoEncoder::isConfigSupported promise when createVideoEncoderConfig does not support the input parameters
<rdar://problem/112005870>
Pull request: https://github.com/WebKit/WebKit/pull/15685
Committed 265900@main (e99a99cea112): <https://commits.webkit.org/265900@main> Reviewed commits have been landed. Closing PR #15685 and removing active labels.