[BUG] default container namespace "k8s.io" should change to "moby"?

[chinglinwen]

Describe the bug
failed to attach interface

here's the error logs

I1108 07:47:08.265374       1 pod.go:202] pod [default/virt-launcher-case1-singlexbjrg-ltftr] updated
I1108 07:47:08.265419       1 network-selection-elements.go:34] parsePodNetworkAnnotation: [{"interface":"net1","name":"vnop2","namespace":"default"}], default
I1108 07:47:08.265474       1 pod.go:217] 1 attachments to add to pod default/virt-launcher-case1-singlexbjrg-ltftr
E1108 07:47:08.267290       1 pod.go:221] failed to figure out the pod's network namespace: failed to get netns for container [903d061e03dee7ef975706352eed3111a1eccdb9185f056196b014f89b79148b]: container "903d061e03dee7ef975706352eed3111a1eccdb9185f056196b014f89b79148b" in namespace "k8s.io": not found

such container-id seems only exist in moby namespace as for docker

Expected behavior
pod added second interface dynamically

To Reproduce
Steps to reproduce the behavior:

1. create vmi
2. kubectl edit vmi pod, add k8s.v1.cni.cncf.io/networks: '[{"interface":"net1","name":"flannel","namespace":"default"}]'
3. kubectl exec into pod, no interface added

Environment:

• multus-dynamic-networks-controller version: N/A
• Kubernetes version (use kubectl version):

Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.2", GitCommit:"59603c6e503c87169aea6106f57b9f242f64df89", GitTreeState:"clean", BuildDate:"2020-01-18T23:30:10Z", GoVersion:"go1.13.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"22", GitVersion:"v1.22.4", GitCommit:"b695d79d4f967c403a96986f1750a35eb75e75f1", GitTreeState:"clean", BuildDate:"2021-11-17T15:42:41Z", GoVersion:"go1.16.10", Compiler:"gc", Platform:"linux/amd64"}

• Network-attachment-definition: N/A
• OS (e.g. from /etc/os-release): CentOS Linux release 7.9.2009
• Controller configuration (criSocketPath / multusSocketPath): /run/multus/multus.sock
• Kernel (e.g. uname -a): Linux stack1.cpp.zll.qianxin-inc.cn 3.10.0-1160.el7.x86_64 ci: add github codeowners file #1 SMP Mon Oct 19 16:18:59 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
• Others: N/A

Additional info / context

docker version

[root@stack1 ~]# docker version
Client: Docker Engine - Community
 Version:           20.10.12
 API version:       1.41
 Go version:        go1.16.12
 Git commit:        e91ed57
 Built:             Mon Dec 13 11:45:41 2021
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.12
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.16.12
  Git commit:       459d0df
  Built:            Mon Dec 13 11:44:05 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.13
  GitCommit:        9cc61520f4cd876b86e77edfeb88fbcd536d1f9d
 runc:
  Version:          1.0.3
  GitCommit:        v1.0.3-0-gf46b6ba
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0