[watcher-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 2.4.0 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: I54cabc517b9a73134fda8b69277b4e61194deece

deliverables/ussuri/watcher-tempest-plugin.yaml

@@ -13,3 +13,7 @@ releases:
     projects:
       - repo: openstack/watcher-tempest-plugin
         hash: caa50e4c7abace6221201a6213d8065ab2f4ff2b
+  - version: ussuri-last
+    projects:
+      - repo: openstack/watcher-tempest-plugin
+        hash: d97f4b3c36d2228da8278700bef8314af8b41689

deliverables/victoria/watcher-tempest-plugin.yaml

@@ -14,3 +14,7 @@ releases:
     projects:
       - repo: openstack/watcher-tempest-plugin
         hash: 7fbabcafa39e99b58aeb542214ebd44272bc54ab
+  - version: victoria-last
+    projects:
+      - repo: openstack/watcher-tempest-plugin
+        hash: d97f4b3c36d2228da8278700bef8314af8b41689