Remove refstack jobs and plugins one make n-v

The refstack jobs have started failing and as the refstack
projects haven't been updated for more than a year, let's
remove the jobs.

Also make the plugins job n-v for now as it keeps timeouting
when running designate-tempest-plugin tests.

Change-Id: I3dd1408cee12f14831743e48f0d11a638bdeb3f6

.zuul.yaml

@@ -16,15 +16,10 @@
         - python-tempestconf-tempest-devstack-admin-2024-1
         - python-tempestconf-tempest-devstack-admin-fips-centos9
         - python-tempestconf-tempest-devstack-demo
-        - python-tempestconf-tempest-devstack-admin-plugins
+        - python-tempestconf-tempest-devstack-admin-plugins:
+            voting: false
         - python-tempestconf-tempest-devstack-enforce-scope-new-defaults-admin
         - python-tempestconf-tempest-devstack-enforce-scope-new-defaults-demo
-        - refstack-client-devstack-master:
-            irrelevant-files: &irrelevant-files
-              - config_tempest/tests/.*$
-              - ^doc/.*$
-              - ^releasenotes/.*$
-              - ^.*\.rst$
         - opendev-tox-docs
     gate:
       jobs:
@@ -39,9 +34,8 @@
         - python-tempestconf-tempest-devstack-admin-2023-2
         - python-tempestconf-tempest-devstack-admin-2024-1
         - python-tempestconf-tempest-devstack-demo
-        - python-tempestconf-tempest-devstack-admin-plugins
-        - refstack-client-devstack-master:
-            irrelevant-files: *irrelevant-files
+        # uncomment when the job is back voting in the check pipeline
+        # - python-tempestconf-tempest-devstack-admin-plugins
         - opendev-tox-docs
     promote:
       jobs:
@@ -51,7 +45,6 @@
         - python-tempestconf-tempest-devstack-demo-2023-1
         - python-tempestconf-tempest-devstack-demo-2023-2
         - python-tempestconf-tempest-devstack-demo-2024-1
-        - refstack-client-devstack-2023-1
 
 
 - job:
@@ -106,7 +99,11 @@
         designate-producer: True
         designate-mdns: True
         barbican: True
-    irrelevant-files: *irrelevant-files
+    irrelevant-files: &irrelevant-files
+      - config_tempest/tests/.*$
+      - ^doc/.*$
+      - ^releasenotes/.*$
+      - ^.*\.rst$
 
 - job:
     name: python-tempestconf-devstack-enforce-scope-new-defaults-base