CI: Update job config for 2023.2 being a stable branch

Increment the jobs, in other words:
* Add jobs for 2023.2
* Mark Zed jobs non-voting
* Remove older jobs from the tempest plugin's normal execution
  as they were non-voting previously.

Change-Id: I27d852063a74938992c5cd37e45bfecf31aadd41
2 files changed