[Feature] Flux CLI should support valuesKey and targetPath in --values-from

[wasabii]

Flux CLI should support valuesKey targetPath in --values-from.

I do not know what a good syntax for this would be.

flux create helmrelease "foo"
    --namespace="foo"
    --release-name="foo"
    --chart-ref="OCIRepository/foo"
    --service-account="foo"
    --values-from="targetPath:ConfigMap/config/key"
    --values="./values.yaml"

Maybe something like that?