Switch from puppet-strings to openvox-strings

Since forklift now uses OpenVox by default (006c52b), switch the
puppet-strings gem to its Vox Pupuli successor openvox-strings and
the puppet-agent package to openvox-agent in the installer roles.

The /opt/puppetlabs paths are unchanged as OpenVox intentionally
uses the same directory layout for compatibility.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: 2 people

roles/foreman_installer/tasks/module_prs.yml

@@ -9,7 +9,7 @@
     name: "{{ item }}"
     executable: /opt/puppetlabs/puppet/bin/gem
   with_items:
-    - puppet-strings
+    - openvox-strings
   when: puppetlabs_gem.stat.exists
   tags:
     - packages

roles/foreman_installer_devel_scenario/tasks/main.yml

@@ -47,14 +47,14 @@
     update: yes
     version: "{{ katello_devel_branch }}"
 
-- name: 'Install puppet-agent'
+- name: 'Install openvox-agent'
   package:
-    name: puppet-agent
+    name: openvox-agent
     state: present
 
 - name: "Install gems to rebuild the kafo module cache"
   gem:
-    name: puppet-strings
+    name: openvox-strings
     executable: /opt/puppetlabs/puppet/bin/gem
     user_install: false
     force: true