Support custom SASL mechanisms including AWS MSK #137

Job	Run time
📦 Build the source distribution	18s
Tests on 3.8	5m 56s
Tests on 3.9	5m 20s
📦 Publish to PyPI	0s
Tests for Kafka 0.9.0.1 (Python 3.12)	2m 51s
Tests for Kafka 0.10.2.2 (Python 3.12)	4m 6s
Tests for Kafka 0.11.0.2 (Python 3.12)	4m 49s
Tests on 3.10	5m 40s
Tests on 3.11	5m 40s
Tests for Kafka 0.11.0.3 (Python 3.12)	5m 0s
Tests on 3.12	5m 34s
Tests for Kafka 1.1.1 (Python 3.12)	5m 7s
Tests on pypy3.9	1m 24s
Tests for Kafka 2.4.0 (Python 3.12)	5m 50s
Tests for Kafka 2.5.0 (Python 3.12)	6m 9s
Tests for Kafka 2.6.0 (Python 3.12)	6m 19s
Tests for Kafka 0.8.2.2 (Python 3.12)	10m 15s
Tests for Kafka 0.8.2.2 (Python 3.10)	2m 30s
✅ Ensure the required checks passing	2s
	1h 22m 50s

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