[zun-tempest-plugin] Tag ussuri-last & victoria-last

Ussuri and Victoria branches are in Extended Maintenance[1].
Once any stable branch is moved to EM state then, Tempest and
its plugins needs to be released[2] so that we have the compatible
tags to test the EM stable branches[3].

We taged ussuri-last & victoria-last for tempest[4] but forgot to do
it for the tempest plugins. Using the tag 4.5.0 hash which is compatible
for tempest ussuri-last and victoria-last.

[1] https://docs.openstack.org/tempest/latest/stable_branch_support_policy.html
[2] https://docs.openstack.org/tempest/latest/tempest_and_plugins_compatible_version_policy.html
[3] https://review.opendev.org/c/openstack/releases/+/843039

Change-Id: I56dedc50d795452c7ee404efd4b043c7aaf8c046

deliverables/ussuri/zun-tempest-plugin.yaml

@@ -13,3 +13,7 @@ releases:
     projects:
       - repo: openstack/zun-tempest-plugin
         hash: 9043347888f26d5c9dc804f758597de2efea0181
+  - version: ussuri-last
+    projects:
+      - repo: openstack/zun-tempest-plugin
+        hash: 6d2529583bc32bcb84e447d5524af1c900cc2845

deliverables/victoria/zun-tempest-plugin.yaml

@@ -14,3 +14,7 @@ releases:
     projects:
       - repo: openstack/zun-tempest-plugin
         hash: 9c28eca4f5bc4f4c300ed28994c33276913a5a84
+  - version: victoria-last
+    projects:
+      - repo: openstack/zun-tempest-plugin
+        hash: 6d2529583bc32bcb84e447d5524af1c900cc2845