chore: disable postinstall scripts, update yarn, run beachball sync - #3974

chore: disable postinstall scripts, update yarn, run beachball sync#3974

Saad Najmi (Saadnajmi) merged 6 commits into

microsoft:mainmicrosoft/fluentui-react-native:mainfrom

Saadnajmi:fixSaadnajmi/fluentui-react-native:fixCopy head branch name to clipboard