fix: repo must be null when helm is in OCI

[cristian98149]

If repo parameter is not set to null when using helm in oci, the following error is reported:

Status:
  Conditions:
    Last Transition Time:  2024-10-18T08:16:59Z
    Message:               cannot update object: CompositionDefinition.core.krateo.io "smartroadsapp" is invalid: spec.chart: Invalid value: "object": Repo is required once set

Setting "repo: null" in values.yaml file used when installing compositiondefinition chart resolve this issue.

[braghettos]

You probably tried to install the chart with the spec.chart.repo key, but you wanted to remove it later. If this is the case, we have the following validation rule: https://github.com/krateoplatformops/core-provider-chart/blob/main/chart/crds/core.krateo.io_compositiondefinitions.yaml#L117-L118 where we remove the possibility to change this value after defining it.

[cristian98149]

The error appeared with 'repo: ""'. We didn't try to remove it later once created.

[braghettos]

@cristian98149 can you please attach the values.yaml file of your chart?