Describe the solution you'd like

Currently, the helmlint hook supports linter_values.yaml as an extra values file to pass to helm lint (docs).

The ask is to, in addition to this file, support ci/default-values.yaml as well.

Why? This would make this pre-commit hook compatible with the chart-testing tool (docs). Then it would be enough to maintain a single ci/default-values.yaml file for all linters.

Rationale: The chart-testing tool is quite popular. Supporting it would make it easier to adopt this pre-commit hook.

Describe alternatives you've considered

The file could be named differently, as long as it satisfies ci/*-values.yaml.

ci/default-values.yaml is a common pattern though: see search results in Sourcegraph.

Alternatively we could add a CLI flag to let the user configure which file to include, but this seems to be unnecessarily complex.

Additional context

I would be happy to send a PR for this FR if you agree with its premise.

It's just a matter of adding a new condition here.