feat: add support for cluster user secrets and settings

[aumer-amr]

This allows for adding extra cluster-secrets to your cluster, without any chance of overriding them accidently.
Since ansible will now always check if the file cluster-secrets-extra.yaml already exists or no.

[aumer-amr]

Note im deffo not an ansible person, so there are more likely better ways.

[onedr0p]

I have a few ideas / questions

1. How do you feel about cluster-secrets-user instead of cluster-secrets-extra ? and we could also do a cluster-settings-user to supplement this change.

2. I'm also curious if that we need to update the bootstrap task in taskfiles to include these new files?

https://github.com/onedr0p/flux-cluster-template/blob/main/.taskfiles/ClusterTasks.yaml#L12L17

[aumer-amr]

I liked the user part, and switched towards that naming scheme. I also added the settings file.
I included it into the task file there, so it will always be applied when normal settings will also be applied. It wasn't really necessary from what i found, more like optional.

I did run into an issue with the line item.path not is match('cluster-(settings|secrets)-user\.yaml\.j2') when i tried it on 2 different machines (vm's though), so please check it.

[onedr0p]

Small nits here but overall looking good.

[aumer-amr]

🚀