[functorch] add error inputs check to vmap test (#83017)
The error inputs check tests that on an error input,
`vmap(op)(*args, **kwargs)` rightfully produces an exception.
This PR also fixes the prelu batching rule, which was missing a check.
Test Plan:
- wait for tests
Pull Request resolved: https://github.com/pytorch/pytorch/pull/83017
Approved by: https://github.com/Chillee
