[WebGPU] GPUDevice::createComputePipeline does not handle missing optional layout field
<rdar://problem/117589263>
Pull request: https://github.com/WebKit/WebKit/pull/19644
Committed 269953@main (693c11af53e2): <https://commits.webkit.org/269953@main> Reviewed commits have been landed. Closing PR #19644 and removing active labels.