MONAI Label needs a group of end-to-end tutorials for users quickStart. Each tutorial should be instructing beginners to hands on MONAI Label + Client step by step. We will do app + Client Viewer + ...

fixes #1905 helps w/ #1899 Changes: - convert sharding from bash to python - create a metadata file to list long running jobs + jobs that require special machines - shard based on time - default to 1 ...