Foreman - Tracker #30160: Extract Puppet ENC to a plugin
Drop puppetclass and environment usage from host tests
We empty the puppetclasses and set the environment prior all Host extension tests.
This needs to be dropped.
Fixes #32923 - do not use Puppet ENC in tests
We are still using Puppet Environment in tests for host extensions. This
needs to be dropped in order to not break tests once puppet bits are
extracted from Foreman.