Model Registry ability to load model

doc/user/project/ml/experiment_tracking/mlflow_client.md

lib/api/api.rb

lib/api/entities/ml/mlflow/get_download.rb

lib/api/entities/ml/mlflow_artifacts/artifact.rb

lib/api/entities/ml/mlflow_artifacts/artifacts_list.rb

lib/api/ml/mlflow/api_helpers.rb

lib/api/ml/mlflow/model_versions.rb

lib/api/ml/mlflow_artifacts/artifacts.rb

lib/api/ml/mlflow_artifacts/entrypoint.rb

spec/factories/packages/package_files.rb

spec/fixtures/packages/ml_model/MLmodel

spec/requests/api/ml/mlflow/model_versions_spec.rb

spec/requests/api/ml/mlflow_artifacts/artifacts_spec.rb