Resync COOP /COEP WPT tests from upstream WPT.
Created attachment 441229 [details] Patch
Created attachment 441299 [details] Patch
Created attachment 441626 [details] Patch
Created attachment 441648 [details] Patch
Seems like we're getting flaky 500 error codes from the wpt server for some reason. Not sure why yet.
Created attachment 441732 [details] Patch
Created attachment 441778 [details] Patch
Comment on attachment 441778 [details] Patch rs=me if the bots are happy
Committed r284510 (243254@main): <https://commits.webkit.org/243254@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 441778 [details].