[barbican-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.
The new version drops python<3.8 support [4], hense doing a MAJOR
version bump to 2.0.0.

[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
[4] https://zuul.opendev.org/t/openstack/build/17f1c6ff2b0449779f23edc2ac0e4b3f/log/tox/list-changes/list-changes-results.log#201-212

Change-Id: Ib430e684a51e097ef2799108698fa838442b3e3a

deliverables/antelope/barbican-tempest-plugin.yaml

@@ -9,3 +9,8 @@ repository-settings:
     tarball-base: barbican_tempest_plugin
 team: barbican
 type: tempest-plugin
+releases:
+  - version: 2.0.0
+    projects:
+      - repo: openstack/barbican-tempest-plugin
+        hash: 30e50ef9c85bf008c7c3e5aeb6b009629a2013c9

deliverables/wallaby/barbican-tempest-plugin.yaml

@@ -22,3 +22,7 @@ releases:
     projects:
       - repo: openstack/barbican-tempest-plugin
         hash: d013596f3dd03ed11ee9b7e0367dbbbd1df60e4b
+  - version: wallaby-last
+    projects:
+      - repo: openstack/barbican-tempest-plugin
+        hash: 30e50ef9c85bf008c7c3e5aeb6b009629a2013c9