_pickle_and_log_artifact doesn't clean up pickle file after logging it as an artifact

[harupy]

This line doesn't seem to clean up the pickle file after logging it as an mlflow artifact.

FLAML/flaml/fabric/mlflow.py

Line 363 in c90946f

self._pickle_and_log_artifact(automl.feature_transformer, "feature_transformer", "feature_transformer.pkl")

This broke our CI (which doesn't allow untracked files being create during test):

https://github.com/mlflow/mlflow/actions/runs/10933548130/job/30352200311

Untracked files found:
feature_transformer.pkl
label_transformer.pkl

[harupy]

I think a temporary directory/file should be used.

[thinkall]

Hi @harupy , thanks for reporting the issue. Would removing the artifact source file after logging work for you?

[harupy]

@thinkall that would work!