add multipart-chunksize parameter #2447

Job	Run time
debian-build (focal)	9s
build (3.8)	1m 22s
build (3.9)	1m 33s
build (3.10)	1m 25s
build (3.11)	1m 22s
k8ssandra-CreateSingleMedusaJob	15m 48s
k8ssandra-CreateSingleDseSearchDatacenterCluster	16m 44s
integration-tests (3.9, local, 2.2.19)	20m 45s
integration-tests (3.9, local, 3.11.11)	15m 42s
integration-tests (3.9, local, 4.0.0)	24m 18s
integration-tests (3.9, s3, 2.2.19)	1m 31s
integration-tests (3.9, s3, 4.0.0)	1m 23s
integration-tests (3.9, gcs, 2.2.19)	2m 10s
integration-tests (3.9, gcs, 4.0.0)	1m 52s
integration-tests (3.9, minio, 2.2.19)	7m 1s
integration-tests (3.9, minio, 4.0.0)	3m 43s
integration-tests (3.9, azure, 2.2.19)	1m 53s
integration-tests (3.9, azure, 4.0.0)	2m 22s
integration-tests (3.9, azure-hierarchical, 2.2.19)	2m 12s
integration-tests (3.9, azure-hierarchical, 4.0.0)	2m 25s
integration-tests (3.11, 4.0.0, gcs, false)	1m 50s
integration-tests (3.10, 4.0.0, gcs, false)	1m 27s
integration-tests (3.8, 4.0.0, gcs, false)	1m 57s
publish-debian	0s
publish-docker-master	0s
publish-docker	0s
publish-pypi	0s
	2h 10m 54s

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