[Antithesis] Store the validation visualization in the host volume

### What would you like to be added?

We can volume mount in client container to host.  For example `artifacts` directory (local to docker-compose).

Visualization should write to this directory by changing https://github.com/etcd-io/etcd/blob/297e9d1d586a12388c8ec49d3bf5e36803064ae0/tests/antithesis/test-template/robustness/main.go#L63


### Why is this needed?

Have report uploaded