[neutron-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: I3bf1c7eef095ffe04ab7a3ed8864eb9a8727176c

deliverables/antelope/neutron-tempest-plugin.yaml

@@ -9,3 +9,8 @@ repository-settings:
     tarball-base: neutron-tempest-plugin
 team: neutron
 type: tempest-plugin
+releases:
+  - version: 2.1.0
+    projects:
+      - repo: openstack/neutron-tempest-plugin
+        hash: 021ce916c6b72f15fa1b873b2c01c1409ca0b37d

deliverables/wallaby/neutron-tempest-plugin.yaml

@@ -18,3 +18,7 @@ releases:
     projects:
       - repo: openstack/neutron-tempest-plugin
         hash: 5ad4e821006b9ae2bbd5aee18f47b8764a2e2f9c
+  - version: wallaby-last
+    projects:
+      - repo: openstack/neutron-tempest-plugin
+        hash: 021ce916c6b72f15fa1b873b2c01c1409ca0b37d