[neutron-tempest-plugin] Tag zed-last

Zed branch is moving to unmaintained state 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 unmaintained state then, Tempest and
its plugins compatible tag[2][3] needs to be released which can be used
to test the unmaintained stable branches.

Tagging 'zed-last' as well as a new version with latest hash.

[1] https://review.opendev.org/q/topic:%22zed-unmaintained%22
[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: I4a20ad7de87e8e649ba904c3a61ff9c27226a70c

deliverables/dalmatian/neutron-tempest-plugin.yaml

@@ -9,3 +9,8 @@ repository-settings:
     tarball-base: neutron-tempest-plugin
 team: neutron
 type: tempest-plugin
+releases:
+  - version: 2.8.0
+    projects:
+      - repo: openstack/neutron-tempest-plugin
+        hash: 17e95518ead3e0787e1bfc77764252c4307109bd

deliverables/zed/neutron-tempest-plugin.yaml

@@ -14,3 +14,7 @@ releases:
     projects:
       - repo: openstack/neutron-tempest-plugin
         hash: 9b74f0c8b79f69fcffffa95c976cc11f4b8ec42f
+  - version: zed-last
+    projects:
+      - repo: openstack/neutron-tempest-plugin
+        hash: 17e95518ead3e0787e1bfc77764252c4307109bd