ci(vagrant): use pre-salted boxes & conditional local settings [skip ci]

* Automated using https://github.com/myii/ssf-formula/pull/311

.github/workflows/kitchen.vagrant.yml

       fail-fast: false
       matrix:
         instance:
-          - freebsd-freebsd-122-latest-py3
-          - freebsd-freebsd-114-latest-py3
+          - freebsd-freebsd-122-master-py3
+          - freebsd-freebsd-114-master-py3
+          # - freebsd-freebsd-122-3002-6-py3
+          # - freebsd-freebsd-114-3002-6-py3
     steps:
       - name: 'Check out code'
         uses: 'actions/checkout@v2'

kitchen.vagrant.yml

   customize:
     usbxhci: 'off'
   gui: false
-  linked_clone: true
   ssh:
     shell: /bin/sh
+  <% unless ENV['CI'] %>
+  linked_clone: true
+  synced_folders:
+    - - '.kitchen/kitchen-vagrant/%{instance_name}/vagrant'
+      - '/vagrant'
+      - 'create: true, disabled: false'
+  <% end %>
 
 platforms:
-  - name: freebsd-122-latest-py3
+  - name: freebsd-122-master-py3
     driver:
-      box: bento/freebsd-12.2
-  - name: freebsd-114-latest-py3
+      box: myii/freebsd-12.2-master-py3
+  - name: freebsd-114-master-py3
     driver:
-      box: bento/freebsd-11.4
-
-provisioner:
-  salt_install: bootstrap
+      box: myii/freebsd-11.4-master-py3
+  - name: freebsd-122-3002-6-py3
+    driver:
+      box: myii/freebsd-12.2-3002.6-py3
+  - name: freebsd-114-3002-6-py3
+    driver:
+      box: myii/freebsd-11.4-3002.6-py3

kitchen.yml

         - path: test/integration/default
   - name: freebsd
     includes:
-      - freebsd-122-latest-py3
-      - freebsd-114-latest-py3
+      - freebsd-122-master-py3
+      - freebsd-114-master-py3
+      - freebsd-122-3002-6-py3
+      - freebsd-114-3002-6-py3
     provisioner:
       state_top:
         base: