LoggerRequest should provide the original property

[saber-wang]

Please answer these questions before submitting your issue.

• Why do you submit this issue?
• Question or discussion
• Bug
• Requirement
• Feature or performance improvement

---

Requirement or improvement

• Please describe about your requirements or improvement suggestions.
  Example:

    public class LoggerRequest
    {
        public string Message{ get; set; }

        public Dictionary<string, object> Tags{ get; set; }

        public LoggerSegmentReference SegmentReference { get; set; }

        public long Date { get; set; }
    }

This will allow custom logs to be processed without overwriting LoggerReporter
Example:

        public async Task ReportAsync(IReadOnlyCollection<LoggerRequest> loggerRequests,
            CancellationToken cancellationToken = default)
        {
            if (!_connectionManager.Ready)
            {
                return;
            }

            var connection = _connectionManager.GetConnection();
            try
            {
                var stopwatch = Stopwatch.StartNew();
                var client = new LogReportService.LogReportServiceClient(connection);
                using (var asyncClientStreamingCall = client.collect(_grpcConfig.GetMeta(),
                           _grpcConfig.GetReportTimeout(), cancellationToken))
                {
                    foreach (var loggerRequest in loggerRequests)
                    {
                        var logBody = new LogData()
                        {
                            TraceContext = new TraceContext()
                            {
                                TraceId = loggerRequest.SegmentReference?.TraceId ?? string.Empty,
                                TraceSegmentId = loggerRequest.SegmentReference?.SegmentId ?? string.Empty,
                                //SpanId=item.Segment
                            },
                            Timestamp = loggerRequest.Date,
                            Service = _instrumentConfig.ServiceName,
                            ServiceInstance = _instrumentConfig.ServiceInstanceName,
                            Endpoint = "",
                            Body = new LogDataBody()
                            {
                                Type = "text",
                                Text = new TextLog()
                                {
                                    Text = Message,
                                },
                            },
                         Tags=...//todo loggerRequest.Tags 
                        };
                        await asyncClientStreamingCall.RequestStream.WriteAsync(logBody);
                    }

                    await asyncClientStreamingCall.RequestStream.CompleteAsync();
                    await asyncClientStreamingCall.ResponseAsync;

                    stopwatch.Stop();
                    _logger.Information($"Report {loggerRequests.Count} logs. cost: {stopwatch.Elapsed}s");
                }
            }
            catch (IOException ex)
            {
                _logger.Error("Report trace segment fail.", ex);
                _connectionManager.Failure(ex);
            }
            catch (Exception ex)
            {
                _logger.Error("Report trace segment fail.", ex);
            }
        }

[wu-sheng]

@liuhaoyang Are you going to finish this?