Retire tempest-horizon

As disscussed in Wallaby PTG [1], QA and Horizon team
decided to move the horizon dashboard test from tempest-horizon
to Tempest. Scenario tests in tempest-horizon have been merged
into the tempest repository.

tempest-horizon is branchless so we can retire it without
a deprecation phase.

Needed-By: https://review.opendev.org/c/openstack/governance/+/774379
Change-Id: I03d3b6ed6fb4e791b801e6073e3e012f0220d78d

gerrit/acls/openstack/tempest-horizon.config

@@ -1,11 +0,0 @@
-[access "refs/heads/*"]
-abandon = group horizon-core
-label-Code-Review = -2..+2 group horizon-core
-label-Workflow = -1..+1 group horizon-core
-
-[receive]
-requireChangeId = true
-requireContributorAgreement = true
-
-[submit]
-mergeContent = true

gerrit/projects.yaml

@@ -5272,7 +5272,8 @@
 - project: openstack/tempest
   description: OpenStack Testing (Tempest) of an existing cloud
 - project: openstack/tempest-horizon
-  description: Horizon plugin for tempest
+  description: RETIRED, Horizon plugin for tempest
+  acl-config: /home/gerrit2/acls/openstack/retired.config
 - project: openstack/tempest-lib
   description: A library to assist in creating functional or integrated test suites
     for OpenStack projects.

gerritbot/channels.yaml

@@ -626,7 +626,6 @@ openstack-horizon:
   projects:
     - openstack/django_openstack_auth
     - openstack/horizon
-    - openstack/tempest-horizon
     - openstack/ui-cookiecutter
     - openstack/xstatic-angular
     - openstack/xstatic-angular-bootstrap

zuul.d/projects.yaml

@@ -5575,16 +5575,6 @@
     gate:
       queue: integrated
 
-- project:
-    name: openstack/tempest-horizon
-    templates:
-      - noop-jobs
-      - official-openstack-repo-jobs
-    check:
-      queue: horizon
-    gate:
-      queue: horizon
-
 - project:
     name: openstack/tempest-lib
     templates:

zuul/main.yaml

@@ -891,7 +891,6 @@
           - openstack/taskflow
           - openstack/telemetry-specs
           - openstack/telemetry-tempest-plugin
-          - openstack/tempest-horizon
           - openstack/tempest-lib
           - openstack/tempest-plugin-cookiecutter
           - openstack/tempest-stress
@@ -1573,7 +1572,6 @@
               - openstack/senlin
               - openstack/senlin-tempest-plugin
               - openstack/swift
-              - openstack/tempest-horizon
 
 - tenant:
     name: zuul