add multipart-chunksize parameter #2477

Job	Run time
debian-build (focal)	5m 11s
build (3.8)	1m 23s
build (3.9)	1m 32s
build (3.10)	1m 29s
build (3.11)	1m 29s
k8ssandra-CreateSingleMedusaJob	19m 52s
integration-tests (3.9, local, 2.2.19)	21m 40s
k8ssandra-CreateSingleDseSearchDatacenterCluster	15m 18s
integration-tests (3.9, local, 3.11.11)	23m 7s
integration-tests (3.9, local, 4.0.0)	22m 37s
integration-tests (3.9, s3, 2.2.19)	2m 6s
integration-tests (3.9, s3, 4.0.0)	1m 37s
integration-tests (3.9, gcs, 2.2.19)	2m 11s
integration-tests (3.9, gcs, 4.0.0)	2m 2s
integration-tests (3.9, minio, 2.2.19)	12m 26s
integration-tests (3.9, minio, 4.0.0)	13m 54s
integration-tests (3.9, azure, 2.2.19)	2m 57s
integration-tests (3.9, azure, 4.0.0)	1m 28s
integration-tests (3.9, azure-hierarchical, 2.2.19)	1m 27s
integration-tests (3.9, azure-hierarchical, 4.0.0)	1m 56s
integration-tests (3.11, 4.0.0, gcs, false)	1m 26s
integration-tests (3.10, 4.0.0, gcs, false)	1m 26s
integration-tests (3.8, 4.0.0, gcs, false)	2m 4s
publish-docker-master	0s
publish-debian	0s
publish-docker	0s
publish-pypi	0s
	2h 40m 38s

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