Dump `iggy-bench` results to csv

[hubcio]

Append them to given csv, and if possible generate excel file with relevant charts.

[Molter23]

I would like to work on it.

[BartoszCiesla]

Go ahead @Molter23 , it's assigned to you now

[seroze]

@hubcio / @BartoszCiesla

1. I think we can go with --bechmark_csv_file as argument name for csv file
2. I assume only one line(info in the below snippet) will be written to this file depending on if it's send_benchmark/poll_benchmark/..etc. We can have something that reads this csv files and generates charts on top of this.

    fn display_settings(&self) {
        let total_messages = self.total_messages();
        let total_size_bytes = total_messages * self.args().message_size() as u64;
        info!(
                "\x1B[32mBenchmark: {}, total messages: {}, total size: {} bytes, {} streams, {} messages per batch, {} batches, {} bytes per message, {} producers\x1B[0m",
                self.kind(),
                total_messages,
                total_size_bytes,
                self.args().number_of_streams(),
                self.args().messages_per_batch(),
                self.args().message_batches(),
                self.args().message_size(),
                self.args().producers(),
            );
    }

[BartoszCiesla]

Yes, that's good idea. Basic use case would be to call bench multiple times so file would have to be updated with each run in order to have data from all the tests. Then charts could be created by importing to spreadsheet or using tools like GNUplot or other tools.