tests: CI/CD pipeline (tmt) - make sure nested containers work via QM

[dougsland]

As soon a new patch arrives for review, we need to trigger a test to make sure QM is executing well the nested container via podman.

The example below are for manual steps:

git clone https://gitlab.com/CentOS/automotive/sample-images.git
pushd osbuild-manifests/
    make cs9-qemu-qm-minimal-regular.x86_64.qcow2
    ./runvm --nographics ./cs9-qemu-qm-minimal-regular.x86_64.qcow2

    user: root
    pass: password
    [root@localhost ~]# podman exec -it qm bash
    bash-5.1#  podman run -it --name fedora fedora  /bin/bash
    bash-5.1# podman ps
    exit
    exit
 (CTRC a-C -> quit) - to exit from qemu emulator 
popd

[dougsland]

cc @pbrilla-rh