Add Ubuntu 24.04 (noble) build to testing

Ubuntu 24.04 has been officially released now, so add some test job
exercising the build.

Change-Id: I59d4c61e58fb37ec2923d64c5991a79658ed6c31

.zuul.d/jobs.yaml

@@ -243,6 +243,22 @@
       nodepool_diskimage:
         base_element: ubuntu-minimal
         release: 'jammy'
+        mirror: "http://{{ zuul_site_mirror_fqdn }}/ubuntu"
+        env-vars:
+          DIB_APT_LOCAL_CACHE: '0'
+          DIB_DISABLE_APT_CLEANUP: '1'
+          DIB_DEBOOTSTRAP_EXTRA_ARGS: '--no-check-gpg'
+
+- job:
+    name: dib-nodepool-functional-openstack-ubuntu-noble-src
+    description: |
+      Test building and booting an Ubuntu noble image with Nodepool
+      and OpenStack
+    parent: dib-nodepool-functional-src-base
+    vars:
+      nodepool_diskimage:
+        base_element: ubuntu-minimal
+        release: 'noble'
         # mirror: "http://{{ zuul_site_mirror_fqdn }}/ubuntu"
         env-vars:
           DIB_APT_LOCAL_CACHE: '0'

.zuul.d/project.yaml

@@ -48,6 +48,7 @@
         - dib-nodepool-functional-openstack-ubuntu-bionic-src
         - dib-nodepool-functional-openstack-ubuntu-focal-src
         - dib-nodepool-functional-openstack-ubuntu-jammy-src
+        - dib-nodepool-functional-openstack-ubuntu-noble-src
         # NOTE(ianw): 2020-04-22 these have been out of the gate for a
         # while; promote to voting after some stability.
         - dib-nodepool-functional-openstack-opensuse-15-src: