Enable ANGLE_ASSERT_ALWAYS_ON when building with libFuzzer.
<rdar://problem/122811102>
Pull request: https://github.com/WebKit/WebKit/pull/24259
Committed 274485@main (4d9acd3befe7): <https://commits.webkit.org/274485@main> Reviewed commits have been landed. Closing PR #24259 and removing active labels.