k3s uninstall shouldn't delete k3s config.yaml

[migs35323]

Is your feature request related to a problem? Please describe.
Sometimes when booting a node there are some initial issues that are easily fixed by uninstalling and reinstall the node, or there are situations when we want to convert a machine from an agent to server etc.

using the uninstall script is very convenient but it has the issue of deleting the k3s config filles that we might want to keep
however it has the drawback of deleting the entire config folder and we need to recreate it.

Describe the solution you'd like
i would like that the uninstall script either questioned to include the config files at /etc/rancher/k3s/ or flag that allows to keep theese files

[brandond]

Have you tried just doing chattr +i /etc/rancher/k3s/config.yaml so that the script can't delete it?