Add description for PeerClassSummary to clarify storage class replication capability

[parikshithb]

Currently, the DRPolicy status includes a peerClasses list showing storage classes and their replication IDs.
However, it does not explicitly indicate whether a storage class supports volume replication or uses VolSync as a fallback.

  hub:
    ...
    drPolicies:
      state: ok ✅
      value:
      - conditions:
        - state: ok ✅
          type: Validated
        drClusters:
        - prsurve-s2-c1
        - prsurve-s2-c2
        name: odr-policy-5m
        peerClasses:
          state: ok ✅
          value:
          - replicationID: 275fb2e9822a88bfbfb96516fd307ff3
            storageClassName: ocs-storagecluster-ceph-rbd
          - replicationID: 275fb2e9822a88bfbfb96516fd307ff3
            storageClassName: ocs-storagecluster-ceph-rbd-virtualization
          - storageClassName: ocs-storagecluster-cephfs
        schedulingInterval: 5m

In this case:
ocs-storagecluster-ceph-rbd and ocs-storagecluster-ceph-rbd-virtualization support VolumeReplication
ocs-storagecluster-cephfs does not support VolumeReplication and instead falls back to VolSync

Add a description field, that provides a description for each storage class’s replication capability.

peerClasses:
  state: ok ✅
  value:
   - description: Storage class can use volume replication
      replicationID: 275fb2e9822a88bfbfb96516fd307ff3
      storageClassName: ocs-storagecluster-ceph-rbd
   - description: Storage class can use volume replication
      replicationID: 275fb2e9822a88bfbfb96516fd307ff3
      storageClassName: ocs-storagecluster-ceph-rbd-virtualization
   - description: Storage class can use volsync
      storageClassName: ocs-storagecluster-cephfs