[WebGPU] Tests don't run correctly in WebKitTestRunner
<rdar://problem/117423898>
Pull request: https://github.com/WebKit/WebKit/pull/19497
Committed 269723@main (eb5d0db0e1f8): <https://commits.webkit.org/269723@main> Reviewed commits have been landed. Closing PR #19497 and removing active labels.