SIMD test gardening
<rdar://problem/106576973>
Pull request: https://github.com/WebKit/WebKit/pull/11388
Test gardening commit 261554@main (3d9ae3d7ebd2): <https://commits.webkit.org/261554@main> Reviewed commits have been landed. Closing PR #11388 and removing active labels.
Closing old bugs assigned to me