[Feature Request] Improve compatibility between PromptFlow and Python modules with relative imports

I am trying to use the promptflow-evals SDK in a project where I am using relative imports, which works fine because of how I call the modules (with python -m modulename).

However, PromptFlow tries to import my file for some reason, and then errors:

  File "/Users/pamelafox/ai-rag-chat-evaluator/scripts/evaluate.py", line 142, in run_evaluation
    results = evaluate(
              ^^^^^^^^^
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/evals/evaluate/_evaluate.py", line 252, in evaluate
    input_data_df, target_generated_columns, target_run = _apply_target_to_data(target, data, pf_client,
                                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/evals/evaluate/_evaluate.py", line 128, in _apply_target_to_data
    run = pf_client.run(
          ^^^^^^^^^^^^^^
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/_sdk/_pf_client.py", line 301, in run
    return self._run(
           ^^^^^^^^^^
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/_sdk/_pf_client.py", line 226, in _run
    return self.runs.create_or_update(run=run, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/_sdk/_telemetry/activity.py", line 265, in wrapper
    return f(self, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/_sdk/operations/_run_operations.py", line 134, in create_or_update
    created_run = RunSubmitter(client=self._client).submit(run=run, **kwargs)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/_sdk/_orchestrator/run_submitter.py", line 42, in submit
    self._run_bulk(run=run, stream=stream, **kwargs)
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/_sdk/_orchestrator/run_submitter.py", line 111, in _run_bulk
    with flow_overwrite_context(flow_obj, tuning_node, variant, connections=run.connections) as flow:
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/contextlib.py", line 137, in __enter__
    return next(self.gen)
           ^^^^^^^^^^^^^^
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/_sdk/_orchestrator/utils.py", line 264, in flow_overwrite_context
    override_flow_yaml(
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/_sdk/_orchestrator/utils.py", line 219, in override_flow_yaml
    update_signatures(code=flow_dir_path, data=flow_dag)
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/_sdk/_utilities/signature_utils.py", line 148, in update_signatures
    signatures, _, _ = infer_signature_for_flex_flow(
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/_sdk/_utilities/signature_utils.py", line 72, in infer_signature_for_flex_flow
    flow_meta = inspector_proxy.get_entry_meta(entry=entry, working_dir=code)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/_proxy/_python_inspector_proxy.py", line 47, in get_entry_meta
    return _generate_flow_meta(
           ^^^^^^^^^^^^^^^^^^^^
  File "/Users/pamelafox/ai-rag-chat-evaluator/.venv/lib/python3.11/site-packages/promptflow/_core/entry_meta_generator.py", line 84, in _generate_flow_meta
    raise GenerateFlowMetaJsonError(error_message)
promptflow.core._errors.GenerateFlowMetaJsonError: Generate meta failed, detail error:
["Failed to load python module from file '/Users/pamelafox/ai-rag-chat-evaluator/scripts/evaluate.py': (ImportError) attempted relative import with no known parent package"]

So now I have to restructure my project to avoid relative imports. Please loosen this constraint.