restore: fix container restore into pod

Currently, when Podman restores a container into a Pod, it always fails
with the following error:

    Error: cannot add container f96670b26e53e70f7f451191ea39a093c940c6c48b47218aeeef1396cb860042 to pod h2-pod: no such pod

This error occurs because r.state.Pod() is called in setupContainer()
with the Pod name instead of ID. This patch fixes this problem by
setting ctrConfig.Pod to pod.ID().

Reported-by: Stanislav Kosorin <stanokosorin4@gmail.com>
Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org>

pkg/checkpoint/checkpoint_restore.go

@@ -102,17 +102,18 @@ func CRImportCheckpoint(ctx context.Context, runtime *libpod.Runtime, restoreOpt
 		if !crutils.CRRuntimeSupportsPodCheckpointRestore(runtime.GetOCIRuntimePath()) {
 			return nil, fmt.Errorf("runtime %s does not support pod restore", runtime.GetOCIRuntimePath())
 		}
-		// Restoring into an existing Pod
-		ctrConfig.Pod = restoreOptions.Pod
 
 		// According to podman pod create a pod can share the following namespaces:
 		// cgroup, ipc, net, pid, uts
 		// Let's make sure we are restoring into a pod with the same shared namespaces.
-		pod, err := runtime.LookupPod(ctrConfig.Pod)
+		pod, err := runtime.LookupPod(restoreOptions.Pod)
 		if err != nil {
 			return nil, fmt.Errorf("pod %q cannot be retrieved: %w", ctrConfig.Pod, err)
 		}
 
+		// Restoring into an existing Pod
+		ctrConfig.Pod = pod.ID()
+
 		infraContainer, err := pod.InfraContainer()
 		if err != nil {
 			return nil, fmt.Errorf("cannot retrieve infra container from pod %q: %w", ctrConfig.Pod, err)