HostPrefix/pod cidr mask is not setup correctly in the nodes

In ROSA, user can be specified an HostPrefix, but we are currently not passing it to the HostedCluster CR. Trying to fix it, it seems that we are not setting up it correctly in the Nodes.

4.12.16

Always

1. Create an HC. Inside the spec add 
  networking:
    clusterNetwork:
    - cidr: 10.128.0.0/14
      hostPrefix: 25
2. Deploy the HC. Check its configuration. 

oc get network cluster is showing the right config (see attachment) 
An oc describe node is always showing a /24 hostPrefix.

Note that this is valid also with the default value of /23. In the node, under podCIDR I always see something like
PodCIDR:                                   10.128.1.0/24 
PodCIDRs:                                  10.128.1.0/24 

I would expect the pod cidr mask to be reflected in the pod configuration

pod cidr is correctly set