type annotations for rembert w/ copies from bert (torch)
Added type annotations to Rembert per the guidelines. Modified Bert where copied from transformers.models.bert.modeling_bert

 #16059

@Rocketknight1 


Note make fixup unable to run in my environment w/ the error message:

```
/usr/bin/sh: -c: line 2: unexpected EOF while looking for matching `"'
/usr/bin/sh: -c: line 3: syntax error: unexpected end of file
make: *** [Makefile:10: modified_only_fixup] Error 2
```
<|||||>_The documentation is not available anymore as the PR was closed or merged._<|||||>ran make fix-copies. Many copies stemming from Bert (torch), some of which don't have typing imports already. Added those where applicable.