Add gha to upload Pyodide javascript bundle to GCS
This adds a github action that makes a binary file out of the pyodide capnproto bundle and uploads it to GCS.
TODO:
- Use the uploaded file (see https://github.com/cloudflare/workerd/pull/2430)
- Move the pyodide js code and this script to pyodide-build-scripts repo.
Move the pyodide js code and this script to pyodide-build-scripts repo.
Should I wait for this to be done before reviewing?
Perhaps. We probably don't need to even merge this since this action is intended to go into pyodide-build-scripts eventually.
Yeah, eventually. We might as well merge this as-is and when we move repos we'll have to update how everything works.
LGTM just a bit outdated since this PR was opened, let's update and merge