test: Add Glue/Iceberg to Pytorch dataloading test

[desmondcheongzx]

Changes Made

Adds an integration test to ensure that Glue/Iceberg -> Pytorch dataloading works.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.77%. Comparing base (260a408) to head (adad0e0).
Report is 15 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4202      +/-   ##
==========================================
- Coverage   78.36%   77.77%   -0.59%     
==========================================
  Files         798      798              
  Lines      104307   107177    +2870     
==========================================
+ Hits        81737    83356    +1619     
- Misses      22570    23821    +1251     

see 109 files with indirect coverage changes

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