[WebGPU] built-in arrayLength assumes all buffers require an arrayLength, when it should not
radar://116539036
Pull request: https://github.com/WebKit/WebKit/pull/18718
Committed 268969@main (d7c9c0b30ecd): <https://commits.webkit.org/268969@main> Reviewed commits have been landed. Closing PR #18718 and removing active labels.