Can't add grafana dashboards if inheriting this package

[gustavovalverde]

When inheriting this package to build your own, it doesn't seem possible to import additional dashboards ven though the configuration file has a parameter for that:

grafana_params:
  additional_dashboards: []

If I try to pass a local directory to it, it complains with:

evaluation error: '/src/grafana/tools/grafana/dashboards' doesn't exist in the package 'ethpandaops/ethereum-package'