Draft: Unit Test for the LSQ

Description

Now that the QAT is available (with the LSQ method), we need a non-regression test that asserts it is working.

For that purpose we will use a small residual ConvNet stored with LFS.

Special care must be taken regarding the RNG initializations.

The test will make use of aidge_backend_cuda, aidge_onnx and aidge_learning.

changed the description

mentioned in issue #45