Refactor FalconMamba

[titaiwangms]

There are significant amount of codes specifically written for the model tiiuae/falcon-mamba-tiny-dev

if config.__class__.__name__ == "FalconMambaConfig":
    pass

onnx-diagnostic/onnx_diagnostic/tasks/text_generation.py

Line 30 in f86c55d

if config.__class__.__name__ == "FalconMambaConfig":

We should simplify/merge it to the main stream of code if possible.

cc @xadupre