Proposal: Change the DNS impl for the nerdctl network

### What is the problem you're trying to solve

For now, the nerdctl uses the `/etc/hosts` file to record the DNS for the different containers.

But in some circumstances, we need to maintain the different hosts file for different containers (add a record when a container create successfully, delete a record when a container delete successfully)

If the file is not right, there should be some DNS issues for the user, such as #1149

So maybe we need to use a better way to record the DNS.

### Describe the solution you'd like

Maybe we can use [dnsname](https://github.com/containers/dnsname) as a reference.

The [dnsname](https://github.com/containers/dnsname) makes a CNI plugin to record the DNS item. It allocates a dnsmasq process for each network. I think it's a good example for us.

cc @AkihiroSuda @junnplus @fahedouch

### Additional context

_No response_