[rpc] add API to return p2p peer info

[LeoHChen]

support both apiv1 and apiv2

Examples on localnet:

curl -s --request POST 'http://127.0.0.1:9500/'
--header 'Content-Type: application/json'
--data-raw '{ "jsonrpc": "2.0", "method": "hmyv2_getPeerInfo", "params": [""], "id": 1}'

curl -s --request POST 'http://127.0.0.1:9500/'
--header 'Content-Type: application/json'
--data-raw '{ "jsonrpc": "2.0", "method": "hmy_getPeerInfo", "params": [""], "id": 1}'

Signed-off-by: Leo Chen leo@harmony.one

[LeoHChen]

curl -s --request POST 'http://127.0.0.1:9500/' --header 'Content-Type: application/json' --data-raw '{ "jsonrpc": "2.0", "method": "hmyv
2_getPeerInfo", "params": [""], "id": 1}' | jq

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "peerid": "Qmd3PVa6exmdEyVRnC8Be13WfLNyA4tfxS77FFETUe88h6",
    "blocked-peers": [],
    "connected-peers": [
      {
        "topic": "hmy/local/0.0.1/node/beacon",
        "peers": [
          "QmZo49QYSmnAnVJ738ZyG17Hjwxthpr1TSYPkVvruVggny",
          "QmZjtPTxRUH6GQXjLvKvWDcHYtMnUKobtfSQ843rMN4WTT",
          "Qmdv6pCoc5J2c97dvbew5PT2gjeFWxKjnLUU1Me3BrSX3W",
          "Qma7gskgbgvfa2myyM8SzfLs5zmDEnraN4CJrTWkf5borU",
          "QmVRttQgdjRtGVU4vfuunpRBpXTZk9YnyY5QSqM6VH5Cp6",
          "QmY967K9Mcrsj1aeMBq4iFGgW36wMNBozADmAq7nStgtJM",
          "QmUmaZUD2WfzWgJkcPameCc8JK7o4wk51rgtCaWj71FEFX",
          "QmZiLorjtgw94Cb5gvoLaSjmWcF89TpH5rEZnsEqEmpSBd",
          "QmdL7BGCmxDQbHrNw8hB6n4wEwntTFYcKTkTbq66RNzhj6",
          "QmQ1eHGJexm9UgG44FQgcb88BBkpdLrvrgNxh6SwfquPUy",
          "QmSVp2pbdhn7rEjT1f74CzxE7PHmNpLozHGxZBh8hqRNsb"
        ]
      },
      {
        "topic": "hmy/local/0.0.1/client/beacon",
        "peers": [
          "QmXHiiT1r7GCsm5CDE26EvCZsr9TY2hPMH3B5wk9NDG6Vd",
          "QmdfD18bpju9HQrL24U4zqpGFzsTXvALaHcwZt9J3ZVCTe",
          "QmUmaZUD2WfzWgJkcPameCc8JK7o4wk51rgtCaWj71FEFX",
          "QmZiLorjtgw94Cb5gvoLaSjmWcF89TpH5rEZnsEqEmpSBd",
          "QmdL7BGCmxDQbHrNw8hB6n4wEwntTFYcKTkTbq66RNzhj6",
          "QmQ357SadsQbyxBTyVhcmDnTbixZayWwAUrNjmBxuNGtbJ",
          "QmUaxWk9Q4372GrmNsRteVAZSQrQStE6bhVVqeK4FRDdJK",
          "QmQ1eHGJexm9UgG44FQgcb88BBkpdLrvrgNxh6SwfquPUy",
          "QmSVp2pbdhn7rEjT1f74CzxE7PHmNpLozHGxZBh8hqRNsb",
          "QmPhnZEuqqhb5S8hmBUyVe2qLikGUS8oKKNWLuPHt2A4bp",
          "QmaBkc9CmAFEeed1u3FvYiUpbJUY7eUMvek6P48D6ymmq9",
          "QmZo49QYSmnAnVJ738ZyG17Hjwxthpr1TSYPkVvruVggny",
          "QmZjtPTxRUH6GQXjLvKvWDcHYtMnUKobtfSQ843rMN4WTT",
          "QmWZovd4UmPQQAVLm9GZ81J9iSTUE36ZH3LY9pqeS3eKS9",
          "QmXYWvfq1QnuEK1v8gUHGFGcmG3npEXCom5NTKRJdkACeK",
          "QmatpqQvdu31txQy8zruToQtx88AYhfSQQC17zPVFRDwk6",
          "Qmd6seMzkeckjcxi81nbu44AyBFQKzoJX9LHaK4dxwRsrA",
          "Qmdv6pCoc5J2c97dvbew5PT2gjeFWxKjnLUU1Me3BrSX3W",
          "Qma7gskgbgvfa2myyM8SzfLs5zmDEnraN4CJrTWkf5borU",
          "QmVRttQgdjRtGVU4vfuunpRBpXTZk9YnyY5QSqM6VH5Cp6",
          "QmY967K9Mcrsj1aeMBq4iFGgW36wMNBozADmAq7nStgtJM",
          "QmYnEakwiZ3YY7ipqMytTR29SbYw1L8oA8Uuqxqc9DvYbg"
        ]
      }
    ]
  }
}