Replace debian-bookworm with debian-trixie for the base job in order to use a newer version of qemu that has patch [0] that addresses an issue where test_boot_cloned_encrypted_volume fails when run on a fast machine. The default python in debain-trixie is Python 3.13, which is a supported python version for the Gazpacho development cycle [1]. Also, updated the package prereq file for some necessary packages that aren't included by default in trixie. [0] https://lists.gnu.org/archive/html/qemu-devel/2025-01/msg01071.html [1] https://governance.openstack.org/tc/reference/runtimes/2026.1.html Related-bug: #2121941 Change-Id: I0db46ae97e61186f7bc2e0c940cf27278d742146 Signed-off-by: Brian Rosmaita <rosmaita.fossdev@gmail.com>