Speed up Ansible tests

Move Molecule Vagrant tests over to QEmu runners on Linux boxes
"Dog-food" the Vagrant VMs
Accelerate linting of Ansible code as well

.github/workflows/test.yml

@@ -16,7 +16,7 @@ name: Test the components of it
 jobs:
   validate:
     name: Validate Packer templates are reasonable
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/setup
@@ -34,7 +34,7 @@ jobs:
 
   collect:
     name: Collect all Ansible-related jobs
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     outputs:
       all: ${{ steps.zipped.outputs.scenarios }}
     steps:
@@ -56,16 +56,18 @@ jobs:
           import json
           ubuntu = json.loads('${{ steps.collection.outputs.tox-envs }}')
           macos  = json.loads('${{ steps.vagrant.outputs.tox-envs }}')
-          ub_zip = [{'os': 'ubuntu-latest', 'scenario': u} for u in ubuntu]
-          mac_zip = [{'os': 'macos-12', 'scenario': m} for m in macos]
+          ub_zip = [{'os': 'ubuntu-22.04', 'scenario': u} for u in ubuntu]
+          mac_zip = [{'os': 'ubuntu-22.04', 'scenario': m} for m in macos]
           print("::set-output name=scenarios::" + json.dumps(ub_zip + mac_zip))
 
   lint:
     name: Lint Ansible code
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
-      - uses: ./.github/actions/setup
+      - name: Checkout code
+        uses: actions/checkout@v3
+      - name: Setup test environment
+        uses: ./.github/actions/setup
         with:
           ansible: true
       - name: Run lint
@@ -83,7 +85,22 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/setup
-      - uses: ./.github/actions/install_virtualbox
-        if: startsWith(matrix.scenarios.os, 'macos')
+      - uses: ./.github/actions/install_packer
+      - name: Install libvirt
+        shell: bash
+        run: |
+          set -exo pipefail
+          sudo apt-get install libvirt-daemon-system
+          sudo usermod -a -G libvirt $USER
+          sudo systemctl start libvirtd
+          sudo ls -la /var/run/libvirt/
       - name: Run scenario
-        run: tox -e "${{ matrix.scenarios.scenario }}"
+        run: |
+          set -ex
+          TOX="$(which tox)"
+          sudo -E su -m -c "groups && ${TOX} -e \"${{ matrix.scenarios.scenario }}\" -- --destroy=never" $USER
+      - name: Get possible output
+        if: ${{ failure() }}
+        run: |
+          set -x
+          cat /home/runner/.cache/molecule/init/ubuntu18/vagrant.err