Support custom SASL mechanisms including AWS MSK #135

Job	Run time
📦 Build the source distribution	16s
Tests for Kafka 0.9.0.1 (Python 3.12)	1m 8s
Tests for Kafka 0.10.2.2 (Python 3.12)	1m 6s
Tests on 3.8	1m 1s
Tests for Kafka 0.11.0.2 (Python 3.12)	1m 32s
📦 Publish to PyPI	0s
Tests on 3.9	1m 9s
Tests for Kafka 0.11.0.3 (Python 3.12)	1m 12s
Tests on 3.10	1m 4s
Tests for Kafka 1.1.1 (Python 3.12)	1m 4s
Tests on 3.11	1m 1s
Tests for Kafka 2.4.0 (Python 3.12)	1m 3s
Tests on 3.12	1m 6s
Tests for Kafka 2.5.0 (Python 3.12)	1m 11s
Tests on pypy3.9	1m 21s
Tests for Kafka 2.6.0 (Python 3.12)	1m 9s
Tests for Kafka 0.8.2.2 (Python 3.12)	1m 19s
Tests for Kafka 0.8.2.2 (Python 3.10)	57s
✅ Ensure the required checks passing	4s
	18m 43s

Provide feedback