Reverse engineer fold indices to simulate cross-validation early stopping

[Innixma]

We know that all folds were generated with the same seed in TabRepo's current suite (AutoGluon default seed), so we can go back and get those indices for each dataset for the purposes of simulating cross-validation early stopping at the fold level.

Reference Paper: "Don’t Waste Your Time: Early Stopping Cross-Validation"

• Check for datasets with <800 rows how many folds were used in the training logs. It might be using 8 always, or otherwise it could be using the old logic that uses between 5-8 folds depending on the number of rows.
• Special handling for RandomForest, ExtraTrees, KNN where we did not use traditional folds when fitting