fix: fix partition_via_api retry mechanism when the default SDK's retry config is empty. #15003

Job	Run time
check-licenses (3.12)	3m 32s
check-deps (3.9)	1m 4s
check-extras (3.9)	31s
setup (3.9)	8s
check-deps (3.10)	1m 8s
check-extras (3.10)	26s
check-deps (3.11)	1m 6s
setup (3.10)	6s
changelog	9s
check-extras (3.11)	26s
check-deps (3.12)	1m 4s
setup (3.11)	6s
check-extras (3.12)	30s
setup (3.12)	6s
shellcheck	10s
shfmt	40s
setup_ingest (3.9)	6s
lint (3.9)	1m 39s
setup_ingest (3.10)	16s
lint (3.10)	1m 39s
lint (3.11)	1m 17s
test_unit_no_extras (3.10)	1m 31s
test_unit (3.9)	20m 47s
test_dockerfile	30m 10s
test_unit (3.10)	24m 20s
test_ingest_src (3.9)	11m 0s
test_unit (3.11)	18m 53s
test_ingest_src (3.10)	29m 26s
test_unstructured_api_unit (3.10)	29s
test_unit (3.12)	21m 6s
test_unit_dependency_extras (3.10, csv)	2m 31s
test_unit_dependency_extras (3.10, docx)	2m 38s
test_unit_dependency_extras (3.10, odt)	2m 56s
test_unit_dependency_extras (3.10, markdown)	2m 11s
test_unit_dependency_extras (3.10, pypandoc)	2m 0s
test_unit_dependency_extras (3.10, pdf-image)	16m 17s
test_unit_dependency_extras (3.10, pptx)	2m 29s
test_unit_dependency_extras (3.10, xlsx)	2m 36s
	3h 27m 29s

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