feat: process configuration in chunks

[CodeReaper]

This pull request makes it so the configuration is split up into chunks and each chunk is processed in its own job. The potential purposes are:

• avoiding disk filling up
• faster runs

The downsides are:

• unable to reliably reset specific contents with a workflow dispatch
• additional compute time is used

[CodeReaper]

This approach seems to have a fatal flaw. Some configurations will produce files with the same names. This seems to happen (currently) for the files in the groups gateway.networking.k8s.io and mysql.presslabs.org. Looks like we need to stick to the current one-by-one approach.