[serge] Fix 2 integration tests for model `fsmt` failing with `output_mismatch` (tensor values differ (2)) (#48496)
* [serge] Fix 2 integration tests for model `fsmt` failing with `output_mismatch` (tensor values differ (2))
* use get_model across tests
---------
Co-authored-by: serge[bot] <serge[bot]@users.noreply.github.com>
Co-authored-by: Tarek Ziade <tarek@ziade.org>