Update GitLab to 17.0
According to the maintenance policy, GitLab should release the next major version towards the end of May of next year.
Because of the apt-pinning configuration implemented in #40769 (closed) (closed), unattended-updates will not automatically install this update.
This is a reminder ticket for the planning, announcement and execution work that must be happen manually.
A new ticket like this should be created with a due date 12 months later when this ticket is due.