Upgrade OS from RHEL 7 to Rocky 8

[matthew-li]

RHEL 7 is no longer receiving security fixes, so the underlying OS should be upgraded to Rocky 8 (like the rest of the cluster).

• Consider using Rocky 8 in the Docker environment (currently Ubuntu).
• Get new boxes for the production instances and rebuild the application there.
  • Upgrade Python.
• Take a downtime, and migrate to the new machine.
  • PostgreSQL database
  • Logs?
  • Set up back up locations, mounts, etc.
• Contact SVM, etc. to cutover to the new box.