Robust.Cdn update, new publishing workflow

[PJB3005]

#32222 switched to the new multi-request publishing workflow in Robust.Cdn. This stops using GitHub Actions artifacts in favor of just sending the files over directly.

This new workflow requires Robust.Cdn v2.2.0, it will not work with older versions. If you are pulling changes from upstream, you must make sure to update your Cdn.

You will also need to change your reverse proxy configuration, if you have one, to allow large request body sizes.

Updating Robust.Cdn

The latest version is backwards compatible with the previous ones.

For people using the container image, simply pulling the latest image on the 2 tag should be enough.

For people manually compiling the program, you will need to pull the latest git release and compile it manually and redeploy.

Undoing the change

If you don't want to immediately update Robust.Cdn, you can simply revert the changes to .github/workflows/publish.yml made in #32222