sysbox: Sysbox do not clean `/var/lib/sysbox/docker/`

Hi @ctalledo and @rodnymolina I am using sysbox on EKS 1.21, using the installer provided for 0.5.2. After some time we discover that our nodes are being filled up with all the old container, was never cleanup.

I check the running container using runc list which return 20 of them, when I check /var/lib/sysbox/docker/ I got 770 directory.

Not sure what is wrong, but something is really weird.

This will become a blocker quickly for us because pod are deleted/ created quite frequently CI/CD/