Add jobs running with 2024.2 and 2025.1 releases and migrate jammy to noble. Tested runtimes in 2025.2: https://governance.openstack.org/tc/reference/runtimes/2025.2.html Remove py38 and py39 tox jobs and 2023.1 and 2023.2 jobs. It's time to drop "Ensure tox (system-wide)" task from the playbook as it is not needed anymore. Change-Id: I977de7148f47309523ceed67aef18f650044b785