[WebGPU] WGPUTextureFormat_RGB10A2Uint should support multisampling
<rdar://problem/118542788>
Pull request: https://github.com/WebKit/WebKit/pull/20645
Committed 270884@main (4c7dcf47194b): <https://commits.webkit.org/270884@main> Reviewed commits have been landed. Closing PR #20645 and removing active labels.