Quadlet add support for --add-host

[jerome59]

Feature request description

In a quadlet file, I don't see any options equivalent to the --add-host of the podman run command.
Today if we want to add some hosts, we need to do :
PodmanArgs=--add-host my-host-name:192.168.10.10 --add-host my-second-host-name:192.168.10.10 --add-host my-third-host-name:192.168.10.11

Suggest potential solution

For Pod and Container units, I'd like to have a key AddHost which allows me to define the same behavior as the --add-host argument.

Example :

AddHost=my-host-name:192.168.10.10
AddHost=my-second-host-name:192.168.10.10
AddHost=my-third-host-name:192.168.10.11

If possible, it would even be better if we can define multiple hostnames for a single IP at once. The previous example would look like :

AddHost=my-host-name;my-second-host-name:192.168.10.10
AddHost=my-third-host-name:192.168.10.11

Have you considered any alternatives?

A clear and concise description of any alternative solutions or features you've considered.

Additional context

Add any other context or screenshots about the feature request here.

[rhatdan]

Please open a PR to add it.