Setup CI vagrant-libvirt for tests on molecule vagrant

[Tcharl]

Describe the Enhancement:

CI is not triggerred yet for projects using molecule-vagrant.
However, it looks like some smart guys did succeed to do it!

see

• https://github.com/alvistack/ansible-role-bootstrap/tree/7f45e943c34ec8a170c145b662bda21c9ac4c9e4

• https://github.com/jonashackt/vagrant-travisci-libvrt

• 💖 vagrant plugin welcomes new contributors and maintainers ansible-community/molecule-plugins#63

So first: test it with github actions
Then, if it doesn't work, go travis

Describe the Need:

Being sure that we do not not introduce any regression :-)

Current Alternative

Local checkout and molecule test

Can We Help You Implement This?:

[Tcharl]

Kind of achieved