[WebGPU] setDepthBias: is never called, depth bias and related functions are not implemented
<rdar://problem/117696050>
Pull request: https://github.com/WebKit/WebKit/pull/19729
Committed 269995@main (7111a438f7c7): <https://commits.webkit.org/269995@main> Reviewed commits have been landed. Closing PR #19729 and removing active labels.