The lxc instance cannot connect

##### ISSUE TYPE

* Bug Report

##### COMPONENT NAME

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##### CLOUDSTACK VERSION

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4.18
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##### CONFIGURATION

##### OS / ENVIRONMENT

ubuntu 22.04.5
##### SUMMARY

I have created an lxc instance【OS：centos 7】 and it appears to have started normally from the system. I used virsh -c lxc:///list on the host to check that lxc is also running. However, when I used virsh -c lxc:///console i-2-3-VM to enter the container instance, I was unable to use it properly. The prompt message is: Failed to create symlink/sys/fs/cgroup/net_cls: Operation not allowed; Did I not set it up properly somewhere;

2、
I logged into the virtual router and pinged the lxc instance's IP address in the virtual router, but it still doesn't work

##### STEPS TO REPRODUCE

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##### EXPECTED RESULTS

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##### ACTUAL RESULTS

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Reproduce the issue with CloudStack 4.18 on Ubuntu 22.04.5, using an LXC instance running CentOS 7 and the reported virsh console and virtual-router checks. Start with the reported cgroup symlink error and failed connectivity; done means the cause, required configuration, and verified connectivity or a confirmed product defect are documented.

Written by the indexing model from the issue text.