Reduce cyclomatic complexity in experimental APIs

[MasterSkepticista]

The functions below are too long and hamper readability.

openfl/openfl/experimental/workflow/workspace_export/export.py

Line 338 in a26bdb2

def generate_data_yaml(self):

openfl/openfl/experimental/workflow/workspace_export/export.py

Line 178 in a26bdb2

def __extract_class_initializing_args(self, class_name):

openfl/openfl/experimental/workflow/utilities/runtime_utils.py

Line 72 in a26bdb2

def filter_attributes(ctx, f, **kwargs):

openfl/openfl/experimental/workflow/utilities/metaflow_utils.py

Line 161 in a26bdb2

def _parse(self, func_ast):

openfl/openfl/experimental/workflow/utilities/metaflow_utils.py

Line 322 in a26bdb2

def save_artifacts(self, artifacts_iter, force_v4=False, len_hint=0):

Suggestions:

• Aim for a function size that fits within screen height (note that reducing comments or blank lines won't change the way formatter views complexity).
• Break down large functions to smaller defs. These helper defs can be part of the same module.
• Try reducing conditional branching

These changes are required to merge #1176.