Add the k8s pause binary to `pause/pause.c` and do the plumbing in the
Makefile to install it in $libexec/podman/pause/pause. It is intended to
replace the k8s pause image and hence the need for network connectivity
when creating pods.
[NO NEW TESTS NEEDED] since it will be tested in a following commit.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
