vmalertmanagerconfig: repeated child routes field

[Haleygo]

There are two child routes field in vmalertmanagerconfig.spec now, and the doc using RawRoutes instead Routes. Is there any particular reason to use RawRoutes? why not use Routes []*Route directly?

[Haleygo]

// CRD schema doesn't support self-referential types for now (see
// kubernetes/kubernetes#62872). We have to use
// an alternative type to circumvent the limitation. The downside is that
// the Kube API can't validate the data beyond the fact that it is a valid
// JSON representation.

I see there is explanation in prometheus operator, so api readability extensionsv1.JSON is needed to circumvent the limitation.
Then vmalertmanagerconfig use route.Routes in code for better code readability.

The doc for Route.routes field might be a little misleading when refer to RawRoutes.