Performance degradation on python producer.send with large number of records

slack thread: https://infinyon.slack.com/archives/CQ8UX6SBH/p1684349700779719

simple producer in python:
```python
#!/usr/bin/env python3
from datetime import datetime
from fluvio import Fluvio
import time

PARTITION = 0

if __name__ == "__main__":
# Connect to cluster
fluvio = Fluvio.connect()

producer = fluvio.topic_producer("simple")

start_time = time.time()

for x in range(10000):
producer.send_string("{}: timestamp: {}".format(x, datetime.now()))

# Flush the last entry
producer.flush()
print("completed in {} seconds", (time.time()-start_time))
```
10K records pushed in 1.2153611183166504 seconds, when if you increase the range to 100000
python3 producer100K.py
The same code takes 64.67606687545776 to complete.
Rust producer doesn't have such behaviour.