The VM masters classify through the cobbler ENC while the k8s compilers
already use encapi. Install the client ahead of that cutover;
external_nodes still points at cobbler-enc, so classification is unchanged.
- pin the encapic package to 0.2.0 via profiles::packages::include
- add profiles::puppet::encapic managing /etc/encapic/encapic.conf from a
hiera-driven ENCAPI_URL, ordered after profiles::packages
- include the class from profiles::puppet::puppetmaster