[WebGPU] connect labels to various MTLResources from WebGPU resources
<rdar://problem/116692054>
Pull request: https://github.com/WebKit/WebKit/pull/18868
Committed 269122@main (89be16f98b9a): <https://commits.webkit.org/269122@main> Reviewed commits have been landed. Closing PR #18868 and removing active labels.