* fix: view snapshot is deleted before diff
* fix: view snapshot is deleted before diff

Signed-off-by: Peng Wang <9db5da8189492413fa5fa439567e236d0c646080@163.com>

vdemeester/containerd,dmcgowan/containerd,crosbymichael/containerd,thaJeztah/containerd,estesp/containerd,crosbymichael/containerd,thaJeztah/containerd,containerd/containerd,dmcgowan/containerd,estesp/containerd,mikebrow/containerd,containerd/containerd,vdemeester/containerd,mikebrow/containerd