Instance launched on proxmox host is losing network connectivity

### problem

The instance launched on proxmox host is losing network connectivity

### versions

ACS 4.21

### The steps to reproduce the bug

Steps to reproduce the issue

1. Launch a vm in proxmox via cloudstack extension
2. The vm gets a ip from cloudstack vrouter
3. Stop the vm
4. Vr goes into shutdown in Cloudstack
5. Start the vm frm clodustack
6. The virtual router starts but vm doesn't get a IP address assigned

### What to do about it?

The vm should get a ip address assigned when the vr is rebooted

首先在 Proxmox CloudStack 擴充功能中重現回報的生命週期：啟動一個 VM，將其停止，讓虛擬路由器關閉，然後從 CloudStack 再次啟動 VM。確認虛擬路由器會重新啟動，但 VM 不會取得 IP 位址；完成標準是 VM 在路由器重新啟動後取得 IP 位址。

由索引模型根據 Issue 內容生成。