v0.39.0

Vendor in containers/storage v1.32.0
Ensure configuration directory is created for networks
Include gateway in generated default networks
Use Private as default for rootless when we want CNI
rootless networking
libimage: add some comments
libimage: add more image tests
build(deps): bump github.com/containers/storage from 1.31.1 to 1.32.0
rootless_networking = "slirp4netns | cni"
build(deps): bump github.com/opencontainers/runc from 1.0.0-rc94 to 1.0.0-rc95