Add Ansible REX job template for virt-who deployment

[chris1984]

Summary

Adds a Remote Execution (REX) Ansible job template that deploys virt-who configurations directly to hosts from the Foreman UI. This provides an alternative to the existing bash deployment script, following the same pattern used by foreman_rh_cloud for cloud connector.

Changes

• app/views/job_templates/deploy_virt_who_config.erb — Inline Ansible playbook that handles virt-who installation (with satellite-maintain/foreman-maintain awareness), password encryption, per-config and global config file deployment, and service management
• db/seeds.d/50_job_templates.rb — Seeds the job template into the database
• lib/foreman_virt_who_configure/engine.rb — Registers the deploy_virt_who_config RemoteExecutionFeature

Supported hypervisor types

• ESX (VMware) — tested
• Hyper-V — tested
• libvirt — tested
• kubevirt — config verified, no test environment
• AHV (Nutanix) — config verified, no test environment

Additional testing

• HTTP/HTTPS proxy and no_proxy settings — tested
• Foreman server FQDN is auto-populated via foreman_server_url (no user input required)

How to test

1. Run foreman-rake db:seed
2. Navigate to Hosts > Job Templates — "Deploy virt-who Config" should appear
3. Run the template against a host with the appropriate inputs
4. Verify config files at /etc/virt-who.d/.conf and /etc/virt-who.conf
5. Verify virt-who service is enabled and running