Transformers 5.13.0 Failure for GraniteMoeParallelExperts

[dsikka]

transformers 5.13.0 renamed GraniteMoeParallelExperts to GraniteMoeExperts with a completely different structure. The import in granitemoe.py fails at module level, which crashes the get_registration call

[dsikka]

Completed by #2885

[kylesayrs]

Fixed by #2847 and fully removed by #2885