refactor: expand Dioptra Client to cover existing RestAPI #667

Job	Run time
build-docker-dioptra-apps (nginx)	3m 0s
build-docker-dioptra-apps (mlflow-tracking)	5m 7s
build-docker-dioptra-apps (restapi)	6m 29s
build-docker-dioptra-apps (pytorch-cpu)	17m 1s
build-docker-dioptra-apps (pytorch-gpu)	56m 15s
build-docker-dioptra-apps (tensorflow2-cpu)	14m 21s
build-docker-dioptra-apps (tensorflow2-gpu)	32m 46s
container-test (mlflow-tracking)	1m 30s
integration-test	0s
	2h 16m 29s

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