JRaft ops interface should require authority

[haoyann]

Is your feature request related to a problem? Please describe.
Anyone can request this interface, permission should be required.

    @PostMapping(value = "/raft")
    public RestResult<String> raftOps(@RequestBody Map<String, String> commands) {
        return protocolManager.getCpProtocol().execute(commands);
    }

Describe the solution you'd like
Only the administrator can request this interface.

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Additional context
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