consensus/clique: re-export the status struct

[holiman]

For some reason, the clique_getstatus (#20103) stopped working on #20316. Re-exporting the status struct makes the computer happy again. 🤷‍♂️

Current master:

[user@work ~]$ echo '{"jsonrpc":"2.0","method":"clique_status","params":[],"id":1}' | nc -U /tmp/geth.ipc | jq .
{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32601,
    "message": "the method clique_status does not exist/is not available"
  }
}

On this PR:

[user@work ~]$ echo '{"jsonrpc":"2.0","method":"clique_status","params":[],"id":1}' | nc -U /tmp/geth.ipc | jq .
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "inturnPercent": 0,
    "sealerActivity": {
      "0x70a562efc38046dd806feac16ce4b5ac4555ec89": 0
    },
    "numBlocks": 18446744073709552000
  }
}

[fjl]

Hmm, this should definitely not be needed. Probably needs to be fixed in package rpc instead.

[fjl]

See #20332