Non-SGPP pods created in v1.12.1+ cannot be deleted in v1.11.4

[jdn5126]

What happened:
Due to #2145, pods created in v1.12.1+ create a PrevResult with a VLAN ID of 0. In v1.11.4 (really anything < v1.12.1), in tryDelWithPrevResult, if PrevResult exists and has a VLAN ID of 0, we return error and do not delete.

Attach logs

error killing pod: failed to "KillPodSandbox" for "8d5583d3-535d-4106-b3be-d42a6d735056" with KillPodSandboxError: "rpc error: code = Unknown desc = networkPlugin cni failed to teardown pod \"test-app-5dc4bf8b96-j6rx5_default\" network: del cmd: failed to delete with prevResult: malformed vlanID in prevResult: 0"

What you expected to happen:
Pod to be deleted

How to reproduce it (as minimally and precisely as possible):

1. Create pod with VPC CNI v1.12.1+
2. Downgrade VPC CNI to v1.11.4
3. Delete pod

Anything else we need to know?:
No

Environment:

• Kubernetes version (use kubectl version): all
• CNI Version: v1.11.4
• OS (e.g: cat /etc/os-release): AL2
• Kernel (e.g. uname -a): Linux 5.4

[jdn5126]

Closing as fixed by #2323 . Fix will ship in v1.11.5

[github-actions]

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