Fix 'tuple' object has no attribute 'to_dict' for bert

[ahsan-ca]

Fixes: AttributeError: 'tuple' object has no attribute 'to_dict' for bert

[causten]

Validated in ROCm MIGXEP

[TedThemistokleous]

ping @tianleiwu need this as we're leveraging your examples for testing

[ahsan-ca]

@tianleiwu Please don't merge this at this time, while this code fixes the issue of AttributeError: 'tuple' object has no attribute 'to_dict', we just discovered a memory access issue with this that needs to be fixed as well.
I will ping here once I update the changes with the fix. Thanks!
FYI @TedThemistokleous

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