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/actions/install_packer/action.yml

@@ -13,14 +13,15 @@ inputs:
 runs:
   using: composite
   steps:
-    - shell: bash
+    - name: Install Packer and deps in Linux
+      shell: bash
       if: runner.os == 'Linux'
       run: |
         set -exo pipefail
         # Install virtualbox
         sudo apt-get update
         # Install QEmu, etc
-        sudo apt-get install -y unzip python3-{virtualenv,yaml} cloud-utils xorriso qemu-system-{x86,ppc}
+        sudo apt-get install -y unzip python3-{virtualenv,yaml} cloud-utils xorriso qemu-system-{x86,ppc} vagrant
         # Install packer.io
         curl -O https://releases.hashicorp.com/packer/${{ inputs.version }}/packer_${{ inputs.version }}_linux_amd64.zip
         unzip -o packer_${{ inputs.version }}_linux_amd64.zip -d /usr/local/bin
@@ -29,9 +30,10 @@ runs:
         curl -L -o pup.zip "https://github.com/ericchiang/pup/releases/download/${{ inputs.pup_version }}/pup_${{ inputs.pup_version }}_linux_amd64.zip"
         sudo unzip pup.zip -d /usr/local/bin
         sudo chmod +x /usr/local/bin/pup
-    - shell: bash
+    - name: Install Packer's deps in macOS
+      shell: bash
       if: runner.os == 'macOS'
       run: |
         set -exo pipefail
-        brew install pup dvdrtools xorriso coreutils gsed
+        brew install pup dvdrtools xorriso coreutils gsed virtualbox vagrant
         # Packer is already installed

.github/actions/install_virtualbox/action.yml

@@ -1,9 +0,0 @@
-name: Install virtualbox on Mac
-description: Installs virtualbox on Mac runners
-runs:
-  using: composite
-  steps:
-    - shell: bash
-      run: |
-        set -exo pipefail
-        brew install virtualbox vagrant