Automatic merge from submit-queue

rkt: Copy the /etc/hosts /etc/resolv.conf into pod dir before mounting.

rkt: Copy the /etc/hosts /etc/resolv.conf into pod dir before mounting.
    
This enables the container to modify the /etc/hosts/ /etc/resolv.conf without changing the host's ones.
With this PR, we now match the docker's behavior.

Fix https://github.com/kubernetes/kubernetes/issues/29022

cc @kubernetes/sig-rktnetes @quentin-m