Cleanup on VIP/Iptables/IPVS on kube-vip deletion (SIGTERM or SIGINT) fails

[wyike]

Describe the bug
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When deleting the kube-vip deployment with control plane lb mode enabled, the controlplane VIP, iptables(masquerade mode) and IPVS should be cleaned up by watching the SIGTERM or SIGINT. But they didn't happen during tests.

To Reproduce
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Expected behavior
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Screenshots
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Environment (please complete the following information):

• OS/Distro: [e.g. Ubuntu 1804]
• Kubernetes Version: [e.g. v.1.18]
• Kube-vip Version: [e.g. 0.2.3]

Kube-vip.yaml:
If Possible add in your kube-vip manifest (please remove anything that is confidential)

Additional context
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[matthewei]

what are progresses for this issue?