add helm-values-command (helm-values from OCM-image-mappings)

[ccwienk]

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[8R0WNI3]

nit: Please let us consistently use either --component or --name (or both)

[ccwienk]

oh dear. I also noticed this inconsistency. With the current commands, we have two conventions:

1. if the only parameter is an ocm-component-name, --name is used
2. if this is not the case, --component is used

I agree this inconsistency is not nice indeed. Will update for this new command + hope to not forget about making other commands consistent in another change.

[kayrus]

@ccwienk according to lss templates, I see there are two different helm-values:

1. admission_helm_values
2. %EXTENSION%_helm_values

It seems that this PR implements only %EXTENSION%_helm_values. What about the admission helm-values?

Also, from the ops perspective I don't care about the required --resource. I have three sinks for values:

$ kubectl get crd extensions.operator.gardener.cloud -o yaml | yq '.spec.versions[].schema.openAPIV3Schema.properties.spec.properties.deployment' | yq '.. | select(has("x-kubernetes-preserve-unknown-fields")) | path | map(select(. != "properties")) | join(".")' 
admission.values
extension.runtimeClusterValues
extension.values

I want to have an ability to populate only three of these, and I have zero clue about what resource name to specify. Is it possible to completely remove the --resource argument?

UPD: also the aws provider extension contains an extra images value: https://github.com/gardener/gardener-extension-provider-aws/blob/c246b59dbdabb168a084ccdf804cd3e39f5e430e/charts/gardener-extension-provider-aws/values.yaml#L6-L8 Is there a way to automatically resolve and generate values for these images as well?