Enable new WebGL conformance tests, conformance/{more,misc,offscreencanvas,ogles}
<rdar://problem/107460595>
Pull request: https://github.com/WebKit/WebKit/pull/12229
Committed 262498@main (a972739be5cb): <https://commits.webkit.org/262498@main> Reviewed commits have been landed. Closing PR #12229 and removing active labels.