[WebGPU] Metal compilation errors should be sent to the Device's validation error
<rdar://problem/125760574>
Pull request: https://github.com/WebKit/WebKit/pull/26888
Committed 277155@main (dbf2de7cd0b3): <https://commits.webkit.org/277155@main> Reviewed commits have been landed. Closing PR #26888 and removing active labels.