(maint) Extract concrete inventory file for pr_testing workflow

The kvm_automation_tooling generated inventory files rely on a fork of the
puppetlabs-terraform module plugins to extract target information from
the Terraform state file
(jpartlow/puppetlabs-terraform@include-module-when-resolving-references).

This change came between v1 and v2 kvm_automation_tooling versions.

When we run openvox_bootstrap tasks, in CI, the Bolt installation only
has the base puppetlabs-terraform module to work with, so we need an
inventory file with explicit target information (ip addresses) now that
nested_vms is using kvm_automation_tooling@v2.

The .inventory.targets from 'bolt inventory show --format json' is
suitable as a concrete list of targets with a little massaging (there is
a 'groups' entry that Bolt doesn't expect in an inventory file).

Author: jpartlow

.github/workflows/pr_testing_with_nested_vms.yml

@@ -58,9 +58,15 @@ jobs:
                 "cpu_mode": "host-model"
               }
             ]
+      - name: Capture dereferenced inventory for use with openvox_bootstrap
+        working-directory: kvm_automation_tooling
+        run: |-
+          bolt inventory --inventory terraform/instances/inventory.test.yaml show --format json --detail | \
+            jq '.inventory | with_entries(select(.key == "targets")) | del(.targets[0].groups)' | \
+            yq -P > ../inventory.yaml
       - name: Run openvox_bootstrap::install task on nested vm
         run: |-
-          bolt task run openvox_bootstrap::install --inventory kvm_automation_tooling/terraform/instances/inventory.test.yaml --targets test-agent-1
+          bolt task run openvox_bootstrap::install --inventory inventory.yaml --targets test-agent-1
       - name: Verify openvox-agent is installed
         run: |-
-          bolt task run openvox_bootstrap::check version=8 test=gt --inventory kvm_automation_tooling/terraform/instances/inventory.test.yaml --targets test-agent-1
+          bolt task run openvox_bootstrap::check version=8 test=gt --inventory inventory.yaml --targets test-agent-1