Handle empty values in values.yaml template

[chainlink]

Values in the values.yaml should only be passed through if they are specified in the given CRD. That way they can rely on chart defaults. As an example, the chart fails to apply by default as reverse gets set to empty string, which is not a valid boolean value

Error message:

values don't meet the specifications of the schema(s) in the following chart(s):\npachyderm:\n- pachd.storage.amazon.reverse: Invalid type. Expected: boolean, given: string\n

This is because the value is rendered out as

reverse: <nil>

https://github.com/pachyderm/openshift-operator/blob/main/hack/charts/2.0.3/values.yaml#L297