[WebGPU] RenderPipeline::getBindGroupLayout can result in out of bounds access when there are no argument buffers
<rdar://problem/104359389>
Pull request: https://github.com/WebKit/WebKit/pull/8751
Committed 259043@main (3a1c2fbdbe3d): <https://commits.webkit.org/259043@main> Reviewed commits have been landed. Closing PR #8751 and removing active labels.