[Bug] Segmentation fault when properties exceed ~100kb

Hi everyone, i'm running an event driven app and i use apache pulsar as backbone. I use message's properties to exchange metadata between the services.

I noted that, when the properties exceed ~100kb the client gives `Segmentation fault (core dumped)` (sometimes `corrupted double-linked list` instead)
> I haven't done a proper test on the size, so take the size as a guideline

I was able to simulate the behaviour in a notebook:

```py
import pulsar
import sys
import json

# need to serialize to json nested object because client accepts properties only
# of type (self: _pulsar.MessageBuilder, arg0: str, arg1: str)
nested_dict = json.dumps({
"foo": "bar"
})

big_dict = {
f"key{i}": nested_dict for i in range(3000)
}

print(sys.getsizeof(big_dict)) # 103856

client = pulsar.Client('pulsar://localhost:6650')
producer = client.create_producer('test-topic')

producer.send(content="test-message".encode(), properties=big_dict) # segfault
```

Unfortunately i don't have details in the stacktrace:

```
In [4]: producer.send(content="test-message".encode(), properties=big_dict)
Segmentation fault (core dumped)
```

Pulsar client version is 3.5.0.

Comece executando a reprodução do notebook com pulsar.Client, create_producer e producer.send usando o payload de propriedades grandes relatado e, em seguida, capture o stack trace ausente. Considera-se concluído quando o mesmo payload não causar mais um segmentation fault nem uma corrupted double-linked list, e houver cobertura para o caso de propriedades grandes.

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