Implement full WebCodecs VideoFrame copyTo for RGB formats
<rdar://problem/100893780>
Pull request: https://github.com/WebKit/WebKit/pull/5181
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/36361
Committed 255429@main (13105f5f6a45): <https://commits.webkit.org/255429@main> Reviewed commits have been landed. Closing PR #5181 and removing active labels.