[magnum-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: I7b0aac783ef0b6e08a22d34a99b89bc0b82d9ab6

deliverables/antelope/magnum-tempest-plugin.yaml

@@ -9,3 +9,8 @@ repository-settings:
     tarball-base: magnum_tempest_plugin
 team: magnum
 type: tempest-plugin
+releases:
+  - version: 1.8.0
+    projects:
+      - repo: openstack/magnum-tempest-plugin
+        hash: 246c3f5544a00ef8e858d977eea7509539978190

deliverables/wallaby/magnum-tempest-plugin.yaml

@@ -18,3 +18,7 @@ releases:
     projects:
       - repo: openstack/magnum-tempest-plugin
         hash: 0e797a80b3eadb95986796fd60ce190fd066c5ea
+  - version: wallaby-last
+    projects:
+      - repo: openstack/magnum-tempest-plugin
+        hash: 246c3f5544a00ef8e858d977eea7509539978190