Replace Helm lookup functions with FluxCD valuesFrom mechanism for
reading cluster and namespace configuration.
Changes:
- Create Secret cozystack-values in each namespace with values.yaml key
containing _cluster and _namespace configuration as nested YAML
- Configure HelmReleases to read from this Secret via valuesFrom
(valuesKey defaults to values.yaml, so it can be omitted)
- Update cozy-lib helpers to access config via .Values._cluster
- Add default values for required _cluster keys to ensure all fields exist
- Update Go code (cozystack-api and helm reconciler) to use new format
This eliminates the need for Helm lookup functions while maintaining
the same configuration interface for charts.
Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Andrei Kvapil <kvapss@gmail.com>
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