feat: retrieve listening processes in firewall port page

[HynoR]

What this PR does / why we need it?

#11414

Summary of your change

• 移除 useStats 检查端口是否使用的逻辑，每个端口都得 net.listen 检测，挺麻烦
• 直接扫一遍 inet 链接，过滤在监听的链接
• 前端调用 listening 接口后，映射到防火墙上

Please indicate you've done the following:

• Made sure tests are passing and test coverage is added if needed.
• Made sure commit message follow the rule of Conventional Commits specification.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed.

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[f2c-ci-robot]

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