added ssh keepalive and pseudo terminal support to orchestrator #2472

Job	Run time
debian-build (focal)	4m 3s
build (3.8)	1m 31s
build (3.9)	1m 24s
build (3.10)	1m 27s
build (3.11)	1m 27s
k8ssandra-CreateSingleMedusaJob	16m 46s
integration-tests (3.9, local, 2.2.19)	20m 9s
k8ssandra-CreateSingleDseSearchDatacenterCluster	15m 20s
integration-tests (3.9, local, 3.11.11)	19m 12s
integration-tests (3.9, local, 4.0.0)	21m 53s
integration-tests (3.9, s3, 2.2.19)	1m 30s
integration-tests (3.9, s3, 4.0.0)	1m 42s
integration-tests (3.9, gcs, 2.2.19)	2m 37s
integration-tests (3.9, gcs, 4.0.0)	1m 29s
integration-tests (3.9, minio, 2.2.19)	11m 2s
integration-tests (3.9, minio, 4.0.0)	12m 45s
integration-tests (3.9, azure, 2.2.19)	2m 4s
integration-tests (3.9, azure, 4.0.0)	2m 5s
integration-tests (3.9, azure-hierarchical, 2.2.19)	1m 34s
integration-tests (3.9, azure-hierarchical, 4.0.0)	1m 35s
integration-tests (3.11, 4.0.0, gcs, false)	1m 47s
integration-tests (3.10, 4.0.0, gcs, false)	1m 28s
integration-tests (3.8, 4.0.0, gcs, false)	1m 53s
publish-debian	0s
publish-docker-master	0s
publish-docker	0s
publish-pypi	0s
	2h 26m 43s

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