CI: Add a non-voting SLURP upgrade job for Ubuntu Jammy

This job tests the Skip Level Upgrade Release Process (SLURP), which
allows upgrading from 2023.1 (Antelope) to 2024.1 (Caracal).

Change-Id: Ia2e687646b8cad904a1722d4ac7d34b2d769853e
(cherry picked from commit 9974e49)

zuul.d/bifrost-jobs.yaml

@@ -228,6 +228,17 @@
       enable_keystone: true
       noauth_mode: false
 
+- job:
+    name: bifrost-slurp-upgrade
+    parent: bifrost-upgrade
+    vars:
+      upgrade_from: stable/2023.1
+
+- job:
+    name: bifrost-slurp-upgrade-ubuntu-jammy
+    parent: bifrost-slurp-upgrade
+    nodeset: ubuntu-jammy
+
 # NOTE(TheJulia): This job is for use on the ironic repository,
 # to provide a minimal platform where we can execute a job where
 # basic performance numbers will be referenced/collected.
@@ -244,4 +255,4 @@
     parent: openstack-tox
     timeout: 7200
     vars:
-      tox_envlist: codespell
+      tox_envlist: codespell

zuul.d/project.yaml

@@ -21,6 +21,8 @@
         - bifrost-upgrade-ubuntu-jammy
         - bifrost-upgrade-keystone-centos9
         # Non-voting jobs
+        - bifrost-slurp-upgrade-ubuntu-jammy:
+            voting: false
         - bifrost-integration-redfish-pxe-uefi-centos-9:
             voting: false
         - bifrost-integration-dhcp-ubuntu-jammy: