fix: ctr run --cni get failed

when   user  executes ctr run --cni to start a container,it will call cni plugin to create network .But when user kills it,the network won’t be removed. if we run a container with same namespace and name again will trigger a bug. we should remove the network when user kills task if it enables cni plugin.

Fix:#6604

Signed-off-by: SongJiang Han <songjiang.dark@gmail.com>

cmd/ctr/commands/run/run_unix.go

@@ -214,6 +214,10 @@ func NewContainer(ctx gocontext.Context, client *containerd.Client, context *cli
 			)
 		}
 
+		if context.Bool("cni") {
+			cniMeta := &commands.NetworkMetaData{EnableCni: true}
+			cOpts = append(cOpts, containerd.WithContainerExtension(commands.CtrCniMetadataExtension, cniMeta))
+		}
 		if caps := context.StringSlice("cap-add"); len(caps) > 0 {
 			for _, cap := range caps {
 				if !strings.HasPrefix(cap, "CAP_") {