customize k3s options, e.g add kube-apiserver args

[curx]

I would like to customize some args for k3s, e.g add kube-apiserver for OIDC and using an own external IDP

[andyjeffries]

Are these things that could be done afterwards with a market place app? We're reluctant to diverge the install away from our standard selection as it can dramatically increase our support burden (we have a small team). If we give options, customers will naturally assume we support them, whereas we make clear that the marketplace is community supported.