Add new airskiff type

Create a site type called skiff and point airskiff site to be based on
the new type. This will help to reduce the duplication when creating
airskiff-suse site in subsequent commit.

Change-Id: Ie9cd6d0e572a4556ee6ff5c3d37f20349c2d7de3

tools/gate/manifests/full-site.yaml

@@ -2,11 +2,13 @@
 schema: armada/Manifest/v1
 metadata:
   schema: metadata/Document/v1
-  name: full-site
   replacement: true
+  name: full-site
+  labels:
+    name: full-site-type
   layeringDefinition:
     abstract: false
-    layer: site
+    layer: type
     parentSelector:
       name: full-site-global
     actions:
@@ -14,8 +16,7 @@ metadata:
         path: .chart_groups
   storagePolicy: cleartext
 data:
-  release_prefix: airship
   chart_groups:
-    - openstack-ingress-controller-airskiff
+    - openstack-ingress-controller
     - openstack-memcached
 ...

tools/gate/playbooks/airskiff-reduce-site.yaml

@@ -17,6 +17,6 @@
     - name: Replace Armada manifest
       shell: |
         mv tools/gate/manifests/full-site.yaml \
-            site/airskiff/software/manifests/full-site.yaml
+            type/skiff/manifests/full-site.yaml
       args:
         chdir: "{{ zuul.project.src_dir }}"