Export Preprocessed Dataset

[marscod]

This is a template update for exporting preprocessed dataset. Related issue (enhancement request): https://github.com/sapientml/sapientml/issues/74

• arguments moved to SapientMLConfig
• added timestamp to avoid duplicate file
• since pipeline does not have access to Dataset (i.e., accessing to csv_encoding and csv_delimiter), then the preprocessed dataset is exported as pickle; any suggestion would be appreciated to save it as CSV.
• Sample usage:

  cls = SapientML(
  target_columns=["survived"],
  task_type=None, # suggested automatically from the target columns
  split_seed=42,
  export_preprocess_dataset=True
  )

Previous PR discussions: https://github.com/sapientml/core/pull/31

[AkiraUra]

@marscod I think the current change is OK. I have two requests:

• Could you merge the latest main branch of https://github.com/sapientml/core to this PR not to the change the code that you might not change such as pipeline_template.py?
• Could you add -s option for git commit to pass DCO? You should do it for the previous commits. Please see https://stackoverflow.com/questions/13043357/git-sign-off-previous-commits if needed.

[marscod]

Resubmitted in https://github.com/sapientml/core/pull/38