New metrics module based on MONAI

[thibaultdvx]

This PR creates a module to get the metrics implemented in MONAI, on the same model than #647. The following metrics would be supported (see https://docs.monai.io/en/stable/metrics.html):

• Classification:

  • Confusion Matrix related (precision, f1 score, etc.)
  • ROC AUC

• Regression

  • MAE
  • MSE
  • RMSE
  • PSNR

• Reconstruction

  • SSIM
  • Multi-scale SSIM
  • regression metrics above

• Segmentation

  • Dice
  • Generalized Dice
  • IoU
  • Surface distance
  • Hausdorff distance
  • Surface dice

• Generation

  • MMD

I'm waiting for R2 score and Average Precision to be implemented in MONAI.

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Waiting for previous PRs to be merged to rebase.

[camillebrianceau]

LGTM !