mgr/cephadm: support nfs cluster level qos

mgr/cephadm: support nfs cluster level qos
Added below CEPH_NODES_LIST block in ganesha.conf and enable_cluster_qos in cluster level QoS block
CEPH_NODES_LIST {
        Ceph_Nodes = 192.168.100.100, 192.168.100.101, 192.168.100.102;
}

Fixes: https://tracker.ceph.com/issues/69861
Signed-off-by: Shweta Bhosale <Shweta.Bhosale1@ibm.com>
mgr/cephadm: Changes to add NFS cluster qos inter node communication port in spec

mgr/nfs: Addressed review comments for cluster level qos support

mgr/nfs: add enable_cluster_qos = true while enabling qos