I'm not sure. Someone who hasn't installed the ChatGPT (or Codex) apps yet could confirm this by installing the apps, seeing if that ~/.cache directory exists, then try running a prompt that needs Python or Node.js or LibreOffice and see if it downloads them when needed.
I've never installed the ChatGPT app on my Mac until today. I ran the app, signed in, and I see the same.
% ls ~/.cache/codex-runtimes/codex-primary-runtime/dependencies/native/libreoffice-headless
libreoffice manifest.json