dask: refactor hard-coded values and rename dask cluster components

[Alputer]

Currently, name of our Dask components Dask cluster, Dask autoscaler, dashboard ingress and are hardcoded in the code. For example the code snippet at the end of this paragraph is taken from reana_workflow_controller.consumer.py. We should probably have a function (e.g def get_dask_cluster_name(worklow_id)) in reana-commons to get the name for these components and make it configurable to cluster admins. Then we can use it where necessary. (reana-server, reana-workflow-controller etc.). Besides, we may consider changing the names of Dask components since some of them are quite verbose and not easy to read. (e.g an ingress component dask-dashboard-ingress-reana-run-dask-acd35ec0-3b81-4eda-b252-dd0d6b180869)

def _delete_dask_cluster(workflow: Workflow) -> None:
    """Delete the Dask cluster resources."""
    current_k8s_custom_objects_api_client.delete_namespaced_custom_object(
        group="kubernetes.dask.org",
        version="v1",
        plural="daskclusters",
        namespace="default",
        name=f"reana-run-dask-{workflow.id_}",
    )

    if DASK_AUTOSCALER_ENABLED:
        current_k8s_custom_objects_api_client.delete_namespaced_custom_object(
            group="kubernetes.dask.org",
            version="v1",
            plural="daskautoscalers",
            namespace="default",
            name=f"dask-autoscaler-reana-run-dask-{workflow.id_}",
        )

    delete_dask_dashboard_ingress(
        f"dask-dashboard-ingress-reana-run-dask-{workflow.id_}", workflow.id_
    )