Addresses the issue with yarn upgrade-interactive documented by @benschac in ENG-1063: https://linear.app/comm/issue/ENG-1063/yarn-upgrade-interactive-functionality-errors
Basically, found that yarn upgrade-interactive failed in every yarn workspace except for keyserver. Was wondering what might be different, and remembered that we had to add an entry to keyserver/.npmrc in order for things to work there (https://phabricator.ashoat.com/D2966).
Tried moving .npmrc to the root of the repo and yarn upgrade-interactive worked fine without errors. I don't have much context on why we needed the .npmrc in the first place, but remember there was some weirdness with matrix/gitlab/etc... (would be good to get @marcinwasowicz's perspective here).