[designate-tempest-plugin] Tag yoga-last

Yoga branch is in 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 (previously for
EM) state then, Tempest and its plugins compatible tag[2][3] needs
to be released so that we can keep testing the unmaintained stable
branches with that tag.

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

[1] https://review.opendev.org/q/topic:%22yoga-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: Ibc68c2e8b8d9f95aac86e9b7564b1bcd7fca499c

deliverables/caracal/designate-tempest-plugin.yaml

@@ -8,3 +8,8 @@ repository-settings:
   openstack/designate-tempest-plugin: {}
 team: designate
 type: tempest-plugin
+releases:
+  - version: 0.21.0
+    projects:
+      - repo: openstack/designate-tempest-plugin
+        hash: 5877572709c671561e8d7df72e2d151ad5e3eaa6

deliverables/yoga/designate-tempest-plugin.yaml

@@ -13,3 +13,7 @@ releases:
     projects:
       - repo: openstack/designate-tempest-plugin
         hash: 1cbfc88d6742aac850a108b9d37223dde8123a43
+  - version: yoga-last
+    projects:
+      - repo: openstack/designate-tempest-plugin
+        hash: 5877572709c671561e8d7df72e2d151ad5e3eaa6