Document TableAlreadyExistsError in catalog.rename_table #8339

Job	Run time
integration-test-s3	7m 9s
integration-test-gcs	6m 57s
integration-test	16m 41s
cibw-dev-env-smoke-test	30s
integration-test-adls	7m 45s
lint-and-unit-test (3.13)	2m 39s
lint-and-unit-test (3.12)	9m 45s
lint-and-unit-test (3.11)	2m 59s
lint-and-unit-test (3.10)	2m 54s
integration-coverage-report	32s
	57m 51s

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