Setup and add EWS129, EWS169 to macOS-BigSur-Debug-Build-EWS
<rdar://problem/100193736>
Pull request: https://github.com/WebKit/WebKit/pull/5098
Committed 255233@main (3c7dafa140a6): <https://commits.webkit.org/255233@main> Reviewed commits have been landed. Closing PR #5098 and removing active labels.