fix: SaslServer busy-loop causes process hang after test suite #8402

Job	Run time
integration-test-adls	7m 16s
integration-test	16m 29s
integration-test-gcs	6m 25s
cibw-dev-env-smoke-test	26s
integration-test-s3	7m 1s
lint-and-unit-test (3.12)	8m 48s
lint-and-unit-test (3.11)	2m 57s
lint-and-unit-test (3.13)	3m 16s
lint-and-unit-test (3.10)	3m 8s
integration-coverage-report	35s
	56m 21s

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