Remove jobs for stable/2023.2 branch

... because stable/2023.2 reached its EOL.

Also replace stable/2023.1 by unmaintained/2023.1 .

Change-Id: I62b250d49e31fc90bcbe668572b906114442f8aa

.zuul.yaml

@@ -113,10 +113,10 @@
     parent: telemetry-tempest-base
     branches:
       # TODO: We should switch to more recent version
-      - stable/2023.2
+      - unmaintained/2023.1
     required-projects:
       - name: gnocchixyz/gnocchi
-        override-checkout: stable/4.6
+        override-checkout: stable/4.5
     vars: &no_prometheus_vars
       devstack_localrc:
         GLOBAL_VENV: False
@@ -130,17 +130,6 @@
             telemetry:
               autoscaling_instance_grouping: prefix
 
-- job:
-    name: telemetry-dsvm-integration
-    parent: telemetry-tempest-base
-    branches:
-      # TODO: We should switch to more recent version
-      - stable/2023.1
-    required-projects:
-      - name: gnocchixyz/gnocchi
-        override-checkout: stable/4.5
-    vars: *no_prometheus_vars
-
 - job:
     name: telemetry-dsvm-integration-ipv6-only-base
     parent: devstack-tempest-ipv6
@@ -168,18 +157,6 @@
         override-checkout: stable/4.6
     vars: *prefix_grouping_vars
 
-- job:
-    name: telemetry-dsvm-integration-ipv6-only
-    parent: telemetry-dsvm-integration-ipv6-only-base
-    description: |
-      Telemetry devstack tempest tests job for IPv6-only deployment
-    branches:
-      - stable/2023.2
-    required-projects:
-      - name: gnocchixyz/gnocchi
-        override-checkout: stable/4.6
-    vars: *no_prometheus_vars
-
 - job:
     name: telemetry-dsvm-integration-ipv6-only
     parent: telemetry-dsvm-integration-ipv6-only-base
@@ -187,7 +164,7 @@
       Telemetry devstack tempest tests job for IPv6-only deployment
     branches:
       # TODO: We should switch to more recent version
-      - stable/2023.1
+      - unmaintained/2023.1
     required-projects:
       - name: gnocchixyz/gnocchi
         override-checkout: stable/4.5