refactor: DataLoaderInfo dataclass

[robinholzi]

Motivation

Small quality of life improvement. I haven't integrated the model into all the dataset implementations yet, even though most of the arguments are already in the DataLoaderInfo. I don't want to jump into this rabbit whole just now 😅

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.36%. Comparing base (b37fc13) to head (2a95340).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #606      +/-   ##
==========================================
+ Coverage   85.25%   85.36%   +0.11%     
==========================================
  Files         255      255              
  Lines       11154    11155       +1     
==========================================
+ Hits         9509     9523      +14     
+ Misses       1645     1632      -13     

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[github-actions]

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