[WebGPU] Make wgslc and wgslfuzz distinct from each other
<rdar://problem/112798797>
Pull request: https://github.com/WebKit/WebKit/pull/16044
Committed 266269@main (e812d681255b): <https://commits.webkit.org/266269@main> Reviewed commits have been landed. Closing PR #16044 and removing active labels.