Simplify aot_module_simplified by removing top_args/top_kwargs
This makes good on Chillee's CR comment at
https://github.com/pytorch/functorch/pull/660/files/af30d351cc93dfafb5a94dbcb32983c5ef65fd6a#r843315222
which was never done in the original PR.
There is no logic change, just unpack the args/kwargs at the top
level and remove the inner function indirection.
Signed-off-by: Edward Z. Yang <ezyangfb.com>
ghstack-source-id: 26883e7249d72df5c8866373989c4e39127ae2ee
Pull Request resolved: https://github.com/pytorch/pytorch/pull/89666
