[va-hci] Add compute VM variable defaults

Define cifmw_libvirt_manager_compute_* variables explicitly to prevent
template evaluation errors during fact gathering. When the scenario
overrides cifmw_libvirt_manager_configuration, Ansible evaluates Jinja2
expressions before va-common.yml variables are in scope.

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Sergii Golovatiuk <sgolovat@redhat.com>

Author: holser

scenarios/reproducers/va-hci.yml

@@ -1,6 +1,12 @@
 ---
 cifmw_parent_scenario: "scenarios/reproducers/va-hci-base.yml"
 
+# Define compute VM settings (required when overriding cifmw_libvirt_manager_configuration)
+cifmw_libvirt_manager_compute_amount: 3
+cifmw_libvirt_manager_compute_disksize: 50
+cifmw_libvirt_manager_compute_memory: 8
+cifmw_libvirt_manager_compute_cpus: 4
+
 # HERE if you want to override kustomization, you can uncomment this parameter
 # and push the data structure you want to apply.
 # cifmw_architecture_user_kustomize: