Add total CPU weight and total NET weight to get_info 📦

[linhuang-blockone]

Change Description

Total CPU and NET weights are added to get_info (https://blockone.atlassian.net/browse/EPE-1801). They are made as optional such that different versions of cleos and nodeos can work.

A sample run of cleos run against the same version of nodeos looks like

./cleos get info
{
  "server_version": "57fdf3b7",
  "chain_id": "8a34ec7df1b8cd06ff4a8abbaa7cc50300823350cadc59ab296cb00d104d2b8f",
  "head_block_num": 2204,
  "last_irreversible_block_num": 2203,
  "last_irreversible_block_id": "0000089bafe800c9dbe39819fc5e875d71d9a712bc591270835f9b2855598923",
  "head_block_id": "0000089c4ea6b4c97c80c7697721a608438959441e1bf92f6a5148c997f7c069",
  "head_block_time": "2021-12-02T18:14:48.500",
  "head_block_producer": "eosio",
  "virtual_block_cpu_limit": 1808373,
  "virtual_block_net_limit": 9498325,
  "block_cpu_limit": 199900,
  "block_net_limit": 1048576,
  "server_version_string": "v2.1.0",
  "fork_db_head_block_num": 2204,
  "fork_db_head_block_id": "0000089c4ea6b4c97c80c7697721a608438959441e1bf92f6a5148c997f7c069",
  "server_full_version_string": "v2.1.0-57fdf3b74a97b2ec7286a352e10de8c03fe6ec01-dirty",
  "last_irreversible_block_time": "2021-12-02T18:14:48.000",
  "total_cpu_weight": 0,
  "total_net_weight": 0
}

A sample run of cleos run against an older version of nodeos looks like

./cleos get info
{
  "server_version": "57fdf3b7",
  "chain_id": "8a34ec7df1b8cd06ff4a8abbaa7cc50300823350cadc59ab296cb00d104d2b8f",
  "head_block_num": 481,
  "last_irreversible_block_num": 480,
  "last_irreversible_block_id": "000001e0ac8805e57055fc6f1c05d579b5112953b623dd9ef59151f4a5f33f33",
  "head_block_id": "000001e19dbe5edbd3da930a4857303f112cda346c6c36e90e147ca52f322542",
  "head_block_time": "2021-12-03T14:30:23.000",
  "head_block_producer": "eosio",
  "virtual_block_cpu_limit": 322985,
  "virtual_block_net_limit": 1694682,
  "block_cpu_limit": 199900,
  "block_net_limit": 1048576,
  "server_version_string": "v2.1.0",
  "fork_db_head_block_num": 481,
  "fork_db_head_block_id": "000001e19dbe5edbd3da930a4857303f112cda346c6c36e90e147ca52f322542",
  "server_full_version_string": "v2.1.0-57fdf3b74a97b2ec7286a352e10de8c03fe6ec01",
  "last_irreversible_block_time": "2021-12-03T14:30:22.500"
}

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total_cpu_weight and total_net_weight are added to get_info chain API endpoint.