Execute tests with Qiboml backends and sparse matrices

[MatteoRobbiati]

This is not really for this PR, but I think that both of them support sparse matrices to some extent https://pytorch.org/docs/stable/generated/torch.sparse.mm.html
https://www.tensorflow.org/api_docs/cc/class/tensorflow/ops/sparse-mat-mul

I am not sure what was causing problems here, but I guess it is more a matter of how the operation is called rather than the impossibility to perform it. Anyway, this is probably out of the scope of this PR.

Originally posted by @BrunoLiegiBastonLiegi in #1510 (comment)