AutoTokenizer fails to do_lower_case
If we use the AutoTokenizer library, this still does not work. 

```
from transformers import AutoTokenizer
tokenizer = AutoTokenizer.from_pretrained("roberta-base", do_lower_case=True)
tokenizer.do_lower_case = True
print(tokenizer.tokenize("Huggingface"))
```

_Originally posted by @pratyushmaini in https://github.com/huggingface/transformers/issues/9122#issuecomment-1152939838_
>>> print(tokenizer.tokenize("Huggingface"))
['Hug', 'ging', 'face']<|||||>Hey @pratyushmaini 👋  Following our bug submission template yields better outcomes -- we have many issues and requests coming in, and we need the help of the community to maximize our usefulness :) One of the fields of the template is `Who can help?`, where you can find the right person to tag on your issue.

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