[WebGPU] getBindGroupLayout() is actually supposed to have "create" semantics
<rdar://problem/105030025>
Pull request: https://github.com/WebKit/WebKit/pull/9640
Committed 259866@main (15c8024a15bf): <https://commits.webkit.org/259866@main> Reviewed commits have been landed. Closing PR #9640 and removing active labels.