add multipart-chunksize parameter #2471

Job	Run time
debian-build (focal)	4m 17s
build (3.8)	1m 23s
build (3.9)	1m 25s
build (3.10)	1m 30s
build (3.11)	1m 23s
k8ssandra-CreateSingleMedusaJob	15m 19s
integration-tests (3.9, local, 2.2.19)	19m 37s
k8ssandra-CreateSingleDseSearchDatacenterCluster	15m 26s
integration-tests (3.9, local, 3.11.11)	21m 8s
integration-tests (3.9, local, 4.0.0)	21m 16s
integration-tests (3.9, s3, 2.2.19)	1m 16s
integration-tests (3.9, s3, 4.0.0)	1m 50s
integration-tests (3.9, gcs, 2.2.19)	1m 47s
integration-tests (3.9, gcs, 4.0.0)	1m 51s
integration-tests (3.9, minio, 2.2.19)	11m 33s
integration-tests (3.9, minio, 4.0.0)	11m 33s
integration-tests (3.9, azure, 2.2.19)	1m 18s
integration-tests (3.9, azure, 4.0.0)	1m 51s
integration-tests (3.9, azure-hierarchical, 2.2.19)	1m 45s
integration-tests (3.9, azure-hierarchical, 4.0.0)	1m 21s
integration-tests (3.11, 4.0.0, gcs, false)	1m 37s
integration-tests (3.10, 4.0.0, gcs, false)	1m 42s
integration-tests (3.8, 4.0.0, gcs, false)	1m 17s
publish-docker-master	0s
publish-debian	0s
publish-docker	0s
publish-pypi	0s
	2h 23m 25s

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