[PR] [SYSTEMDS-3548] Optimize IO path Python interface for SystemDS [systemds]

[via GitHub]

Nakroma opened a new pull request, #2154:
URL: https://github.com/apache/systemds/pull/2154

   Draft for the student project `SYSTEMDS-3548`.
   
   Current contributions:
   - Fixes some minor bugs related to the performance tests
   - Parallelizes pandas_to_frame_block column processing (see image below for 
speed up, tested on my machine)
   
   
![load_pandas](https://github.com/user-attachments/assets/92f54cbf-e45c-40d7-90da-373a2b3138ba)
   


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