[vitrgae-tempest-plugin] Tag wallaby-last

Wallaby branch is in Extended Maintenance now[1]. Tempest and
tempest plugins are branchless which means master version of
Tempest and its plugins is used to test the supported stable
branches.

Once any stable branch is moved to EM state then, Tempest and
its plugins compatible tag[2] needs to be released so that we can
keep testing the EM stable branches with that tag once master
Tempest and its plugins are not compatible[3].

Tagging 'wallaby-last' as well as a new version also with same hash.

[1] https://releases.openstack.org/wallaby/index.html
[2] https://docs.openstack.org/tempest/latest/stable_branch_support_policy.html
[3] https://docs.openstack.org/tempest/latest/tempest_and_plugins_compatible_version_policy.html

Change-Id: I57bdf8a7b5d5a9f9c99a37b3125aa9d9468b40f6

deliverables/antelope/vitrage-tempest-plugin.yaml

@@ -8,3 +8,8 @@ repository-settings:
   openstack/vitrage-tempest-plugin: {}
 team: vitrage
 type: tempest-plugin
+releases:
+  - version: 6.1.0
+    projects:
+      - repo: openstack/vitrage-tempest-plugin
+        hash: 3c22c4451802a10070eda2582ffa6067e2b035ec

deliverables/wallaby/vitrage-tempest-plugin.yaml

@@ -17,3 +17,7 @@ releases:
     projects:
       - repo: openstack/vitrage-tempest-plugin
         hash: 09cb732532d1ebc0fbf4fb4f8bcd1e2f3ff0a7f6
+  - version: wallaby-last
+    projects:
+      - repo: openstack/vitrage-tempest-plugin
+        hash: 3c22c4451802a10070eda2582ffa6067e2b035ec