Support chunked responses for REPL queries

[candrewlee14]

The 1.x InfluxDB CLI supported chunked responses with the command chunked. The 2.x REPL does not yet, but it should. The 2.x docs don't show that this functionality is available, but this code exists in OSS (and similar code in cloud):

// Parse chunk size. Use default if not provided or cannot be parsed
chunked := r.FormValue("chunked") == "true"
chunkSize := DefaultChunkSize
if chunked {
    if n, err := strconv.ParseInt(r.FormValue("chunk_size"), 10, 64); err == nil && int(n) > 0 {
        chunkSize = int(n)
    }
}

Relevant docs page: https://docs.influxdata.com/influxdb/v2.2/query-data/influxql/