fix(tests): isolate state in test_write_optional_list #8445

Job	Run time
integration-test	17m 2s
integration-test-s3	7m 7s
integration-test-gcs	7m 42s
cibw-dev-env-smoke-test	24s
integration-test-adls	7m 3s
lint-and-unit-test (3.10)	4m 4s
lint-and-unit-test (3.11)	3m 2s
lint-and-unit-test (3.13)	4m 8s
lint-and-unit-test (3.14)	2m 32s
lint-and-unit-test (3.12)	9m 38s
integration-coverage-report	32s
	1h 3m 14s

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