Attempting to install the wrong binary package on Ubuntu 22.04 runner

[eitsupi]

Describe the bug

p3m does not provide arm64 binary packages for all versions of Ubuntu.
However, since #1063, the arm64 Ubuntu runner has been configured to automatically use p3m, which has resulted in incorrect repository configurations on the Ubuntu 22.04 runner.

https://github.com/pola-rs/r-polars/actions/runs/24957879593/job/73082892689
https://github.com/pola-rs/r-polars/actions/runs/27052357981/job/79873660870

To Reproduce

      - name: Set up R
        uses: r-lib/actions/setup-r@v2
        with:
          use-public-rspm: true

Expected behavior

If the correct binary repository cannot be configured, it should fall back to a repository that provides the source package.

Additional context

[gaborcsardi]

AFAIR PPM serves source packages if binaries are not available, so this is probably a bug in pak.

A possible workaround is to use ubuntu 24.04, for which PPM does have binaries.