Add distro and arch info to guests.yaml

[jchecahi]

It might be useful to have some of the extra information that tmt run prints for the provision step dumped in the result guests.yaml file located under <tmt-run-dir>/<plan>/provision/. For example when running with tmt run -vv provision -h container -i fedora:38 tmt prints this info for the provision step:

    provision
        how: container
        image: fedora:38
        Check for container image 'fedora:38'.
        name: tmt-195-XueQEvTE
        distro: Fedora Linux 38 (Container Image Prerelease)
        kernel: 6.0.12-300.fc37.x86_64
        summary: 1 guest provisioned

However, when inspecting guests.yaml we see this:

default-0:
    role:
    guest: tmt-198-FipCKXmQ
    image: fedora:38
    user: root
    force_pull: false
    container: tmt-198-FipCKXmQ
    __class__:
        module: tmt.steps.provision.podman
        name: PodmanGuestData

It would be very useful to have at least the distro and architecture (or kernel, from which we can infer the arch) for later inspection. That way we can see where a past run was run.