[WebGPU] maxBindGroupsPlusVertexBuffers limit is incorrect
<rdar://problem/116940919>
Pull request: https://github.com/WebKit/WebKit/pull/19075
Committed 269349@main (8cbfc4626ba2): <https://commits.webkit.org/269349@main> Reviewed commits have been landed. Closing PR #19075 and removing active labels.