add podman support

[LimeHat]

I'm going to give it a shot since you already got an interface, posting this just for the tracking purposes.

[GrigoriyMikhalkin]

Hi @LimeHat! Do you work on that? I also had a plan to look into that this weekend.

[LimeHat]

Hi Grigory,
yep, I am; work in progress. I can share an alpha branch sometime next week

[hellt]

the podman (beta) support has been added
Soon I will carve out 0.23.0 release with these changes

[cgb]

Podman 4.0 was released recently too with some major networking changes, not sure how this will affect the integration work but just a heads up :)

https://github.com/containers/podman/releases/tag/v4.0.0

[LimeHat]

Thanks @cgb. We plan to work on adding v4 support in March.

[q2dg]

I'm running Containerlab v0.42.0 in a Fedora 38 system with Podman 4.5.1
When I run sudo containerlab deploy -t linux.clab.yml -r podman (after having started Podman service first with sudo systemctl start podman), I get this error message when I just want to deploy a lab with a "linux" kind node:

failed to run postdeploy task for node cont1: failed to Statfs "/run/netns/netns-421753a3-065e-aef4-b860-1b5d71b21570": no such file or directory

I found this solution (#577 (comment)) but is related to run containerlab inside a container. I don't wanna this: I've installed containerlab as a regular rpm package in my Fedora host

I need Containerlab to run over Podman because nowadays Docker isn't available in RedHat based host systems

P.S: On the other hand, if Podman can run rootless containers, could it be possibe to run containerlab in rootless mode too? This would be a game changer ("/etc/hosts" could not be modified, but, well, I think it'd be a minor issue) . Thanks!