feat: add group definitions for gitlab runners and writers

Author: jackhodgkiss

etc/kayobe/inventory/group_vars/gitlab-runners/runners.yml

@@ -0,0 +1,9 @@
+---
+# Configuration of GitLab runners using riemers.gitlab-runner should go here.
+# See documentation for more information
+# https://github.com/riemers/ansible-gitlab-runner
+# https://stackhpc-kayobe-config.readthedocs.io/en/stackhpc-2024.1/configuration/ci-cd.html
+
+###############################################################################
+# Dummy variable to allow Ansible to accept this file.
+workaround_ansible_issue_8743: yes

etc/kayobe/inventory/group_vars/gitlab-writers/writer.yml

@@ -0,0 +1,8 @@
+---
+# Configuration of GitLab pipelines generated with stackhpc.kayobe_workflows.gitlab should go here.
+# See documentation for more information
+# https://github.com/stackhpc/ansible-collection-kayobe-workflows/blob/main/roles/gitlab/README.md
+
+###############################################################################
+# Dummy variable to allow Ansible to accept this file.
+workaround_ansible_issue_8743: yes

etc/kayobe/inventory/groups

@@ -38,6 +38,12 @@ overcloud
 [github-writer]
 localhost
 
+[gitlab-runners]
+# Empty group to provide declaration of gitlab-runner group.
+
+[gitlab-writer]
+localhost
+
 ###############################################################################
 # Overcloud groups.
 
@@ -87,6 +93,7 @@ network
 monitoring
 storage
 compute
+infra-vms
 
 [docker-registry:children]
 # Hosts in this group will have a Docker Registry deployed. This group should