Integrate listener list output to subsystem list

[rahullepakshi]

With #1086 we get host NQNs to subsystem list, likewise having listener list against a subsystem will keep all information pertaining to subsystem at one place eliminating need of listener list and host list commands

Proposed output would be as below

# podman run --rm quay.io/ceph/nvmeof-cli:latest --server-address 10.0.66.114 subsystem list
Subsystems:
╒═══════════╤═══════════════════════════════════╤════════════════════╤══════════════════╤═════════════╤══════════════╤════════════╤══════════╤══════════╤══════════╕
│ Subtype   │ NQN                               │ Serial             │ Controller IDs   │   Namespace │          Max │   DHCHAP   │ Allow    │ Host NQNs│ Listeners│
│           │                                   │ Number             │                  │       Count │   Namespaces │   Key      │ Any Host │          │          │
╞═══════════╪═══════════════════════════════════╪════════════════════╪══════════════════╪═════════════╪══════════════╪════════════╪══════════╪══════════╪══════════╡
│ NVMe      │ nqn.2016-06.io.spdk:cnode1.group1 │ Ceph23571808504978 │ 1-2040           │           8 │         1400 │ No         │ Yes      │ NA       │<IP:port> │
├───────────┼───────────────────────────────────┼────────────────────┼──────────────────┼─────────────┼──────────────┼────────────┼──────────┼──────────┼──────────┤
│ NVMe      │ nqn.2016-06.io.spdk:cnode2.group1 │ Ceph67858855260085 │ 1-2040           │           8 │         1400 │ No         │ No       │<host_NQN>│<IP:PORT> │
╘═══════════╧═══════════════════════════════════╧════════════════════╧══════════════════╧═════════════╧══════════════╧════════════╧══════════╧══════════╧══════════╛

[gbregman]

Again, we can't have all the information displayed in "subsystem list". This will be impossible to watch on a screen. As it already I need to maximize my window to see the entire table without line breaks.