Is your feature request related to a problem? Please describe.

Currently, the helmchart objects have one label - k0s.k0sproject.io/stack: helm. It would make it easier for us to backup and restore these objects if we were able to add additional labels to the object.

Describe the solution you would like

There was a top-level field within 'helmextensions' that allowed specifying a set of labels to apply to every chart.

Describe alternatives you've considered

Backing up with the k0s.k0sproject.io/stack: helm label should be possible, but isn't as easy to configure.

Additional context

No response