Check if relative size of intersection of winnery ticket with each layer is correlated to the layer robustness

[dorimedini]

Depends on #83 The winning lottery ticket L is a sub-graph of the trained model M. If L[i] (resp. M[i]) is layer i of L (resp. M), it would be interesting to see if the ratio R[i]=len(set(L[i]).intersection(M[i])) / len(M[i]) is correlated to the robustness of layer i. Maybe first check what they did in https://www.cs.montana.edu/sheppard/pubs/ijcnn-2019d.pdf