Support Ansible prepare step in image mode

[thrix]

Summary

Add support for Ansible prepare step when running in image mode.

Recommendation

Use ansible-podman or buildah connection plugin for connecting to the container.

There could be some inspiration from the old baseos-qe way of setting up images.

Proposed Steps

This will happen after the container image is available:

1. Take the container image on which the machine is running on
2. Run it as a container
3. Connect through ansible-podman
4. Do the changes (execute Ansible prepare steps)
5. Reboot to the new image

Expectation

This workflow will happen on the guest.

Links

• https://github.com/linux-system-roles/tox-lsr/blob/main/src/tox_lsr/test_scripts/runcontainer.sh
• https://developers.redhat.com/articles/2025/03/18/how-use-rhel-system-roles-image-mode#