Do not install containerd on dedicated etcd with etcd_deployment_type=host

[jsalatiel]

Please do not install containerd on the host if etcd_deployment_type=host and the only role the server has is being etcd host. Apparently containerd is installed but not used for anything.

Environment:

• Cloud provider or hardware configuration:
  N/A
• OS (printf "$(uname -srm)\n$(cat /etc/os-release)\n"):
  N/A
• Version of Ansible (ansible --version):
  N/A
• Version of Python (python --version):
  N/A