Enhance Network Peering translation in `apinetlet` and `metalnetlet` with Peering Prefix

[kasabe28]

Summary

Enhance network peering by exposing only specified Prefixes of peered network. Prefixes is a list of CIDRs that we want only to be exposed to the peered network, if no prefixes are specified no filtering will be done and entire network will be peered.

There will be no change in metalnet Network structure as Prefixes are already there. Only translation logic will be added in metalnetlet.

Apinet network structure along with prefixes will look like below:

Basic example

apiVersion: core.apinet.ironcore.dev/v1alpha1
kind: Network
metadata:
  namespace: apinetlet-system
  name: 2020dcf9-e030-427e-b0fc-4fec2016e73a
spec:
  id: "10606139"
  peerings:
    id: "19837404"
    name: "peering1"
    prefixes:
    - name: prefix1
      prefix: 10.30.0.0/24
status:
  peerings:
    id: "19837404"
    state: ready
---
apiVersion: core.apinet.ironcore.dev/v1alpha1
kind: Network
metadata:
  namespace: apinetlet-system
  name: 3030dcf9-f031-801b-f0f0-4fec2016e73a
spec:
  id: "19837404"
  peerings:
    id: "10606139"
    name: "peering1"
    prefixes:
    - name: prefix1
      prefix: 10.40.0.0/24
status:
  peerings:
    id: "10606139"
    state: ready