adding flaky failures to webgl test expectations
<rdar://problem/99772359>
Test gardening commit 254348@main (7111cbd9fd80): <https://commits.webkit.org/254348@main> Reviewed commits have been landed. Closing PR #4216 and removing active labels.
I had originally attempted to add test expectations for BigSur gpuprocess in mac-wk2, and that did not work. Added flaky failures under the webgl test expectations. After landing 254348@main, I verified that all of these tests consistently pass on the flakiness dashboard.