Automate generation of kube-state-metrics configuration

**User Story**

As a developer, I would like the kube-state-metrics configuration to be automatically generated from the API

**Detailed Description**

We currently introduced the first kube-state-metrics configuration for Cluster API objects, but in the current state this file must be updated every time there is an API change.

We would like to automate the generation of the kube-state-metrics configuration, so changes in the API will be automatically reflected.

**Anything else you would like to add:**

A similar tool can be really usefull to allow impementation of kube-state-metrics in providers; ideally, this tool should be hosted in kube-state-metrics project, but IMO it is ok to host this temporarily in CAPI if this speed up the process.

/kind feature