[WebGPU] ShaderModuleImpl::compilationInfo is not implemented
<rdar://problem/117424136>
Pull request: https://github.com/WebKit/WebKit/pull/19499
Committed 269725@main (ff9c8f8718f3): <https://commits.webkit.org/269725@main> Reviewed commits have been landed. Closing PR #19499 and removing active labels.