Add goal to migrate CI/CD jobs to Ubuntu Noble

Change-Id: I7d9b31929677318ef9b27d1a4ad9c8b1c169b751

goals/proposed/migrate-ci-jobs-to-ubuntu-noble.rst

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+=================================================
+Migrate CI/CD jobs to Ubuntu 24.04 (Noble Numbat)
+=================================================
+
+For the Epoxy development cycle :doc:`current tested runtime </reference/runtimes/2025.1>`
+was defined to support Ubuntu 24.04 (Noble). This means that our jobs should
+be compatible with this distribution and using it by default. We should
+identify and migrate jobs that are currently using Ubuntu 22.04 (Jammy)
+to use Ubuntu 24.04 (Noble) instead.
+
+If any failures related to the new distro (Noble) block project development
+progress, then we can help project to either with fixing code to support
+Ubuntu 24.04 or override nodeset for their jobs and add Noble jobs as
+non-voting, so that projects can continue using Jammy nodeset until codebase
+is fully compatible with Noble.
+Custom project jobs that define nodeset explicitly may remain intact and
+allow projects to manage such jobs on their own.
+
+Stable branches will keep using their original distro version, and that will
+be handled with job branches variant.
+
+Champion
+========
+
+Ghanshyam Mann (gmann)
+
+Gerrit Topic
+============
+
+To facilitate tracking, commits related to this goal should use the
+gerrit topic::
+
+  migrate-to-noble
+
+Completion Criteria
+===================
+
+#. All official OpenStack projects should test their codebase against
+   Ubuntu 24.04 (Noble Numbat).
+
+
+Current State / Anticipated Impact
+==================================
+
+A big amount of jobs, like openstack-python3-jobs, docs or devstack, currently
+use Ubuntu 22.04 (Jammy) but we have a passing devstack platform job on Noble.
+First, we will provide the devstack base job on Noble with WIP, and majority of
+projects will test it before merging.