Fix visibility of torch::nn::RNNImpl::options (#33718)
Summary:
In PR https://github.com/pytorch/pytorch/issues/33027, `options` in RNNImpl was mistakenly changed to `protected` (it was `public` before)
```
protected:
FORWARD_HAS_DEFAULT_ARGS({1, AnyValue(Tensor())})
RNNOptions options;
```
This PR changes it back to `public` again.
Fixes https://github.com/pytorch/pytorch/issues/33694.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/33718
Differential Revision: D20075149
Pulled By: yf225
fbshipit-source-id: 82901369eeaacd82df849e17df64dc1aaf98f9fe
