Move Mac EWS to macOS Catalina
<rdar://problem/73465512>
<rdar://problem/73465535>
Created attachment 418084 [details] Patch
Created attachment 418089 [details] Patch
Created attachment 418660 [details] Patch for landing
Committed r272029: <https://trac.webkit.org/changeset/272029> All reviewed patches have been landed. Closing bug and clearing flags on attachment 418660 [details].