Changes to the ubuntu-24.04 image mean that our way of starting Snapcraft hangs, waiting for a password from sg (as detailed in https://github.com/actions/runner-images/issues/9932). This PR instead uses sudo -u $USER to run Snapcraft with a refreshed set of group memberships. This appears to work on the ubuntu-24.04 image as well as the older images.
I've also updated the CI testing matrixes to test on the new image and test a base: core24 project.
Changes to the
ubuntu-24.04image mean that our way of starting Snapcraft hangs, waiting for a password fromsg(as detailed in https://github.com/actions/runner-images/issues/9932). This PR instead usessudo -u $USERto run Snapcraft with a refreshed set of group memberships. This appears to work on theubuntu-24.04image as well as the older images.I've also updated the CI testing matrixes to test on the new image and test a
base: core24project.