[WebGPU] "unorm10-10-10-2" vertex format is not implemented
<rdar://problem/117284162>
Pull request: https://github.com/WebKit/WebKit/pull/19379
Committed 269660@main (c22f641da18b): <https://commits.webkit.org/269660@main> Reviewed commits have been landed. Closing PR #19379 and removing active labels.