[zun-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: I0d523d2619cf37a0f55d79d08c6a471839295597

deliverables/antelope/zun-tempest-plugin.yaml

@@ -9,3 +9,8 @@ repository-settings:
     tarball-base: zun-tempest-plugin
 team: zun
 type: tempest-plugin
+releases:
+  - version: 4.7.0
+    projects:
+      - repo: openstack/zun-tempest-plugin
+        hash: 6a7c3f7c4c3fd8ca4d4f2e57b1cc7b791e9cf2d4

deliverables/wallaby/zun-tempest-plugin.yaml

@@ -18,3 +18,7 @@ releases:
     projects:
       - repo: openstack/zun-tempest-plugin
         hash: 749acf98d6b72a3a98823e8ed85c4a6e8929712c
+  - version: wallaby-last
+    projects:
+      - repo: openstack/zun-tempest-plugin
+        hash: 6a7c3f7c4c3fd8ca4d4f2e57b1cc7b791e9cf2d4