Specify changepoints for Tamland per component
This is related to https://gitlab.com/gitlab-com/gl-infra/tamland/-/merge_requests/428 and moves information about changepoints into the service catalog, rather than specifying them in Tamland itself.
Related Slack thread: https://gitlab.slack.com/archives/C01AHAD2H8W/p1689610991849879
Edited by Andreas Brandl