BUG: Remove padding when loading slides

[fepegar]

Fixes #314.

Cucim adds black padding when loading slides using a bounding box that is not fully within the slide's field of view.
Some margin can be added to bounding boxes in LoadPandaROId, but that's not needed in this application.
This PR sets padding (margin) to 0 when creating the tiles dataset, therefore

I will also upload the new data set to Azure and modify the dataset name in our code.

[codecov]

Codecov Report

Merging #387 (66498d9) into main (b8eef6b) will decrease coverage by 0.36%.
The diff coverage is 100.00%.

Flag	Coverage Δ
hi-ml-histopathology	74.67% <100.00%> (-0.79%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...hology/preprocessing/create_panda_tiles_dataset.py	33.73% <ø> (ø)
...ology/src/histopathology/datasets/default_paths.py	100.00% <100.00%> (ø)
...pathology/src/histopathology/utils/report_utils.py	65.97% <0.00%> (-8.72%)	⬇️
...istopathology/src/histopathology/models/deepmil.py	83.33% <0.00%> (-6.06%)	⬇️
...stopathology/src/histopathology/models/encoders.py	84.05% <0.00%> (-4.66%)	⬇️
...c/histopathology/configs/classification/BaseMIL.py	63.74% <0.00%> (-1.92%)	⬇️
...-histopathology/src/histopathology/utils/naming.py	98.57% <0.00%> (+0.13%)	⬆️