Display hash_revision for etcdctl endpoint hash

[ahrtr]

The server side change is done in #14537.

This PR is the etcdctl side change, and also cover the test.

Please read https://github.com/etcd-io/etcd/blob/main/CONTRIBUTING.md#contribution-flow.

[codecov-commenter]

Codecov Report

Merging #14812 (33d9303) into main (9cc2f64) will decrease coverage by 0.24%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main   #14812      +/-   ##
==========================================
- Coverage   75.64%   75.40%   -0.25%     
==========================================
  Files         457      457              
  Lines       37391    37393       +2     
==========================================
- Hits        28284    28195      -89     
- Misses       7336     7415      +79     
- Partials     1771     1783      +12     

Flag	Coverage Δ
all	75.40% <0.00%> (-0.25%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
etcdctl/ctlv3/command/printer.go	33.33% <0.00%> (-0.27%)	⬇️
etcdctl/ctlv3/command/printer_fields.go	6.06% <0.00%> (-0.04%)	⬇️
server/proxy/grpcproxy/auth.go	44.44% <0.00%> (-44.45%)	⬇️
server/proxy/grpcproxy/maintenance.go	45.45% <0.00%> (-36.37%)	⬇️
server/etcdserver/api/v3rpc/interceptor.go	73.43% <0.00%> (-9.38%)	⬇️
client/v3/concurrency/session.go	88.63% <0.00%> (-4.55%)	⬇️
server/etcdserver/api/rafthttp/msgappv2_codec.go	71.30% <0.00%> (-3.48%)	⬇️
client/v3/leasing/txn.go	88.09% <0.00%> (-3.18%)	⬇️
server/proxy/grpcproxy/cluster.go	74.35% <0.00%> (-2.57%)	⬇️
client/v3/concurrency/election.go	79.68% <0.00%> (-2.35%)	⬇️
... and 16 more

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[ahrtr]

Some examples output.

$ ./etcdctl endpoint hash --cluster -w table
+------------------------+------------+----------+
|        ENDPOINT        |    HASH    | REVISION |
+------------------------+------------+----------+
|  http://127.0.0.1:2379 | 2064120424 |       13 |
| http://127.0.0.1:22379 | 2064120424 |       13 |
| http://127.0.0.1:32379 | 2064120424 |       13 |
+------------------------+------------+----------+

$ ./etcdctl endpoint hash --cluster -w fields
"ClusterID" : 17237436991929493444
"MemberID" : 9372538179322589801
"Revision" : 13
"RaftTerm" : 2
"Endpoint" : "http://127.0.0.1:2379"
"Hash" : 2064120424
"HashRevision" : 13

"ClusterID" : 17237436991929493444
"MemberID" : 10501334649042878790
"Revision" : 13
"RaftTerm" : 2
"Endpoint" : "http://127.0.0.1:22379"
"Hash" : 2064120424
"HashRevision" : 13

"ClusterID" : 17237436991929493444
"MemberID" : 18249187646912138824
"Revision" : 13
"RaftTerm" : 2
"Endpoint" : "http://127.0.0.1:32379"
"Hash" : 2064120424
"HashRevision" : 13

$ ./etcdctl endpoint hash --cluster -w simple
http://127.0.0.1:2379, 2064120424, 13
http://127.0.0.1:22379, 2064120424, 13
http://127.0.0.1:32379, 2064120424, 13

$ ./etcdctl endpoint hash --cluster -w json | jq
[
  {
    "Endpoint": "http://127.0.0.1:2379",
    "HashKV": {
      "header": {
        "cluster_id": 17237436991929494000,
        "member_id": 9372538179322590000,
        "revision": 13,
        "raft_term": 2
      },
      "hash": 2064120424,
      "compact_revision": -1,
      "hash_revision": 13
    }
  },
  {
    "Endpoint": "http://127.0.0.1:22379",
    "HashKV": {
      "header": {
        "cluster_id": 17237436991929494000,
        "member_id": 10501334649042878000,
        "revision": 13,
        "raft_term": 2
      },
      "hash": 2064120424,
      "compact_revision": -1,
      "hash_revision": 13
    }
  },
  {
    "Endpoint": "http://127.0.0.1:32379",
    "HashKV": {
      "header": {
        "cluster_id": 17237436991929494000,
        "member_id": 18249187646912140000,
        "revision": 13,
        "raft_term": 2
      },
      "hash": 2064120424,
      "compact_revision": -1,
      "hash_revision": 13
    }
  }
]

[ahrtr]

Rebased this PR and updated the examples for etcdctl endpoint hashkv command in etcdctl readme.md.

[ahrtr]

cc @ptabor @serathius @spzala

[ptabor]

Thank you. Just a few nits.