[utils] Test refactor to separate data and tests

beat/editor/templates/algorithm.jinja2

beat/editor/templates/database.jinja2

beat/editor/templates/library.jinja2

beat/editor/test/reference_data/empty_algorithm.py

beat/editor/test/reference_data/empty_database.py

beat/editor/test/reference_data/empty_library.py

beat/editor/test/test_utils.py