pkg/oci: Add ProxyConfig to the runtime configuration
pkg/oci: Add ProxyConfig to the runtime configuration

We want to be able to carry the CC proxy
runtime socket path.

Signed-off-by: Samuel Ortiz <0ba86cb3f08bbb861958e54bd3438887adb4263c@linux.intel.com>

containers/virtcontainers,wcwxyz/virtcontainers,wcwxyz/virtcontainers,containers/virtcontainers,wcwxyz/virtcontainers