Currently, helm template takes --api-versions and --kube-version, which is great for use with charts that depend on these values.

It is also, IMO, a good idea that these field are not auto-populated on helm template by default. However, when we do want them populated, manually inputting them is painful.

It would be nice to add a flag to auto detect this (same as helm install). This would be useful for cases like helm template --detect-kube-version | kubectl apply -f - or equivalent, where we already know the cluster we are going to apply to eventually.