Multisampling does not work on GPUFamilyApple2 devices when using ANGLE Metal Current multisample codepath uses StoreAndResolve
<rdar://problem/90949957>
Pull request: https://github.com/WebKit/WebKit/pull/1411
Committed r295431 (251437@main): <https://commits.webkit.org/251437@main> Reviewed commits have been landed. Closing PR #1411 and removing active labels.