sandbox: Allows the sandbox to be deleted in NotReady state
sandbox: Allows the sandbox to be deleted in NotReady state

The Pod Sandbox can enter in a NotReady state if the task associated
with it no longer exists (it died, or it was killed). In this state,
the Pod network namespace could still be open, which means we can't
remove the sandbox, even if --force was used.

Signed-off-by: Claudiu Belu <af739d2f4a05c59b6221d22d4e3a86ff2cbe39c4@cloudbasesolutions.com>

estesp/containerd,thaJeztah/containerd,mikebrow/containerd,containerd/containerd,estesp/containerd,thaJeztah/containerd,mikebrow/containerd,dmcgowan/containerd,dmcgowan/containerd,containerd/containerd