fix(sec): upgrade k8s.io/kube-proxy to 1.18.4

[chncaption]

What happened？

There are 1 security vulnerabilities found in k8s.io/kube-proxy v0.25.6

• CVE-2020-8558

What did I do？

Upgrade k8s.io/kube-proxy from v0.25.6 to 1.18.4 for vulnerability fix

What did you expect to happen？

Ideally, no insecure libs should be used.

The specification of the pull request

PR Specification from OSCS

[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[sealos-ci-robot]

🤖 Generated by lychee action

Summary

Status	Count
🔍 Total	846
✅ Successful	323
⏳ Timeouts	0
🔀 Redirected	0
👻 Excluded	522
❓ Unknown	0
🚫 Errors	0

Full action output

Full Github Actions output

[fengxsong]

#3385 #3364

[cuisongliu]

This upgrade needs to be more cautious and needs to be tested.

[cuisongliu]

https://m.freebuf.com/vuls/245955.html
This vulnerability seems to have no impact on us. We use kube-proxy to use the ipvs module, and the rest is to call template rendering.