Stable/2024.1 is going to unmaintained state[1]
and Tempest does not support unmaintained releases
so this marks the end of support for stable/2024.1.
This adds the release note to mark the end of
support of 2023.2 as well as drop the job.
[1] https://review.opendev.org/c/openstack/releases/+/963711
Change-Id: Ia1ccf30bc6ad024f80e7bc7816ac24bae91b7c1d
Signed-off-by: Ghanshyam Maan <gmaan@ghanshyammann.com>