Draft: Scripted flattening of scheduled ci spikes

A script that mimics Run CI/CD pipelines on a schedule - Implement C... (gitlab-org/gitlab#17799) in a much simpler manner. Either way, we probably need to adapt gitlab#30038's SQL query, to get project IDs, count pipelines & jobs.

• Creating issues in all projects with a very popular cron schedule that suggest to the project maintainers to vary the schedule a bit.
• Optionally weighted towards projects that create many pipelines with many jobs. Some SQL JOINs may be needed.