[ONNX] Extra support for bernoulli export (#88655)
* add opset 15 support for `bernoulli`.
* add extra export options for different `bernoulli` cases: `x.bernoulli(p)` where `p` is a tensor or float.
Fixes #88299
Pull Request resolved: https://github.com/pytorch/pytorch/pull/88655
Approved by: https://github.com/BowenBao
